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coderinblack08coderinblack08
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more usaco
1 parent 5945946 commit 1e9973e

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+846
-93
lines changed

‎usaco/.DS_Store

0 Bytes
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‎usaco/silver/abc

108 KB
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‎usaco/silver/abc.cpp

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#include <bits/stdc++.h>
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using namespace std;
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using ll = long long;
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using vi = vector<int>;
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#define pb push_back
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#define all(x) begin(x), end(x)
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#define sz(x) (int) (x).size()
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using pi = pair<int,int>;
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#define f first
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#define s second
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#define mp make_pair
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void __print(int x) {cerr << x;}
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void __print(long x) {cerr << x;}
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void __print(long long x) {cerr << x;}
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void __print(unsigned x) {cerr << x;}
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void __print(unsigned long x) {cerr << x;}
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void __print(unsigned long long x) {cerr << x;}
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void __print(float x) {cerr << x;}
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void __print(double x) {cerr << x;}
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void __print(long double x) {cerr << x;}
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void __print(char x) {cerr << '\'' << x << '\'';}
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void __print(const char *x) {cerr << '"' << x << '"';}
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void __print(const string &x) {cerr << '"' << x << '"';}
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void __print(bool x) {cerr << (x ? "true" : "false");}
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template<typename T, typename V>
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void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
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template<typename T>
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void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
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void _print() {cerr << "]\n";}
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template <typename T, typename... V>
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void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
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#ifndef ONLINE_JUDGE
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#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
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#else
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#define debug(x...)
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#endif
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void setIO(string s = "") {
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ios_base::sync_with_stdio(0);
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cin.tie(0);
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if ((int)s.size()) {
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freopen((s + ".in").c_str(), "r", stdin);
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freopen((s + ".out").c_str(), "w", stdout);
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}
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}
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void solve() {
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int n;
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cin >> n;
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vi nums(n);
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for (int i = 0; i < n; i++) {
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cin >> nums[i];
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}
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set<int> s;
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for (int i : nums) {
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s.insert(i);
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for (int j : nums) {
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if (i < j) s.insert(j - i);
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}
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}
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int triplets = 0;
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for (int a : s) {
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for (int b : s) {
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for (int c : s) {
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if (a <= b && b <= c) {
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bool works = true;
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set<int> p{a, b, c, a + b, a + c, b + c, a + b + c};
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for (int x : nums) {
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if (!p.count(x)) works = false;
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}
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if (works) triplets++;
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}
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}
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}
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}
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cout << triplets << endl;
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}
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int main() {
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setIO();
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int t;
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cin >> t;
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while (t--) solve();
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return 0;
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}

‎usaco/silver/cowoperations

67.3 KB
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‎usaco/silver/cowoperations.cpp

Lines changed: 95 additions & 0 deletions
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#include <bits/stdc++.h>
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using namespace std;
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using ll = long long;
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using vi = vector<int>;
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#define pb push_back
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#define all(x) begin(x), end(x)
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#define sz(x) (int) (x).size()
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using pi = pair<int,int>;
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#define f first
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#define s second
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#define mp make_pair
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void __print(int x) {cerr << x;}
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void __print(long x) {cerr << x;}
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void __print(long long x) {cerr << x;}
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void __print(unsigned x) {cerr << x;}
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void __print(unsigned long x) {cerr << x;}
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void __print(unsigned long long x) {cerr << x;}
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void __print(float x) {cerr << x;}
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void __print(double x) {cerr << x;}
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void __print(long double x) {cerr << x;}
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void __print(char x) {cerr << '\'' << x << '\'';}
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void __print(const char *x) {cerr << '"' << x << '"';}
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void __print(const string &x) {cerr << '"' << x << '"';}
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void __print(bool x) {cerr << (x ? "true" : "false");}
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template<typename T, typename V>
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void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
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template<typename T>
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void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
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void _print() {cerr << "]\n";}
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template <typename T, typename... V>
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void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
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#ifndef ONLINE_JUDGE
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#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
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#else
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#define debug(x...)
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#endif
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void setIO(string s = "") {
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ios_base::sync_with_stdio(0);
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cin.tie(0);
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if ((int)s.size()) {
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freopen((s + ".in").c_str(), "r", stdin);
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freopen((s + ".out").c_str(), "w", stdout);
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}
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}
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/*
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OW -> WCCO -> WO (you can swap neighborring letters)
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you can rearrange the word however you want
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we can test based on parity because order doens't matter
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*/
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int main() {
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setIO();
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string s;
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int q;
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cin >> s >> q;
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int n = sz(s);
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vi c(n + 1, 0), o(n + 1, 0), w(n + 1, 0);
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for (int i = 0; i < n; i++) {
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c[i + 1] = c[i] + (s[i] == 'C');
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o[i + 1] = o[i] + (s[i] == 'O');
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w[i + 1] = w[i] + (s[i] == 'W');
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}
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while (q--) {
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int l, r;
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cin >> l >> r;
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int C = (c[r] - c[l - 1]) % 2;
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int O = (o[r] - o[l - 1]) % 2;
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int W = (w[r] - w[l - 1]) % 2;
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// (C O W)
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// (0 0 0) -> 0
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// (1 0 0) -> 1
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// (0 1 0) -> 0
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// (0 0 1) -> 0
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// (1 1 0) -> 0
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// (1 0 1) -> 0
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// (0 1 1) -> 1
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// (1 1 1) -> 0
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if ((C == 1 && O == 0 && W == 0) || (C == 0 && O == 1 && W == 1)) {
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cout << "Y";
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} else {
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cout << "N";
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}
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}
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cout << "\n";
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return 0;
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}

‎usaco/silver/directions

54.9 KB
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‎usaco/silver/directions.cpp

Lines changed: 113 additions & 0 deletions
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#include <bits/stdc++.h>
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using namespace std;
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using ll = long long;
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using vi = vector<int>;
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#define pb push_back
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#define all(x) begin(x), end(x)
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#define sz(x) (int) (x).size()
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using pi = pair<int,int>;
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#define f first
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#define s second
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#define mp make_pair
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struct DSU {
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vector<int> e;
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void init(int N) { e = vector<int>(N, -1); }
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int get(int x) { return e[x] < 0 ? x : e[x] = get(e[x]); }
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bool sameSet(int a, int b) { return get(a) == get(b); }
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vector<int> sameSetElements(int x) {
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vector<int> res;
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for (int i = 0; i < e.size(); i++) {
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if (sameSet(x, i)) res.push_back(i);
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}
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return res;
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}
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int size(int x) { return -e[get(x)]; }
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bool unite(int x, int y) {
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x = get(x), y = get(y);
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if (x == y) return 0;
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if (e[x] > e[y]) swap(x, y);
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e[x] += e[y]; e[y] = x;
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return 1;
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}
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};
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int n;
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DSU dsu;
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const int N = 1505;
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int grid[N + 1][N + 1];
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int comp[N + 1][N + 1];
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bool vis[N + 1][N + 1] = {false};
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void floodfill(int r, int c) {
46+
if (r < 0 || r >= n || c < 0 || c >= n || vis[r][c]) return;
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vis[r][c] = true;
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if ((char)grid[r][c] == 'R') {
49+
dsu.unite(r * (n + 1) + c, r * (n + 1) + c + 1);
50+
floodfill(r, c + 1);
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}
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if ((char)grid[r][c] == 'D') {
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dsu.unite(r * (n + 1) + c, (r + 1) * (n + 1) + c);
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floodfill(r + 1, c);
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}
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}
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void solve() {
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ll cost = 0;
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for (int i = 0; i < n; i++) {
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cost += (dsu.size(n * (n + 1) + i) - 1) * grid[n][i];
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cost += (dsu.size(i * (n + 1) + n) - 1) * grid[i][n];
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}
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cout << cost << endl;
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}
66+
67+
int main() {
68+
cin >> n;
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dsu.init((n + 1) * (n + 1));
70+
for (int i = 0; i < n; i++) {
71+
string s; int c;
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cin >> s >> c;
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for (int j = 0; j < s.size(); j++) {
74+
grid[i][j] = s[j];
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}
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grid[i][n] = c;
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}
78+
for (int i = 0; i < n; i++) {
79+
cin >> grid[n][i];
80+
}
81+
for (int r = 0; r < n; r++) {
82+
for (int c = 0; c < n; c++) {
83+
if (!vis[r][c]) {
84+
floodfill(r, c);
85+
}
86+
}
87+
}
88+
solve();
89+
int q;
90+
cin >> q;
91+
while (q--) {
92+
int i, j;
93+
cin >> i >> j;
94+
i--; j--;
95+
if (grid[i][j] == 'R') {
96+
grid[i][j] = 'D';
97+
} else {
98+
grid[i][j] = 'R';
99+
}
100+
auto elems = dsu.sameSetElements(i * (n + 1) + j);
101+
for (auto x : elems) {
102+
vis[x / (n + 1)][x % (n + 1)] = false;
103+
dsu.e[x] = -1;
104+
}
105+
for (auto x : elems) {
106+
if (!vis[x / (n + 1)][x % (n + 1)]) {
107+
floodfill(x / (n + 1), x % (n + 1));
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}
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}
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solve();
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}
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return 0;
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}

‎usaco/silver/findandreplace.cpp

Lines changed: 54 additions & 0 deletions
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#include <bits/stdc++.h>
2+
using namespace std;
3+
4+
using ll = long long;
5+
6+
using vi = vector<int>;
7+
#define pb push_back
8+
#define all(x) begin(x), end(x)
9+
#define sz(x) (int) (x).size()
10+
11+
using pi = pair<int,int>;
12+
#define f first
13+
#define s second
14+
#define mp make_pair
15+
16+
void __print(int x) {cerr << x;}
17+
void __print(long x) {cerr << x;}
18+
void __print(long long x) {cerr << x;}
19+
void __print(unsigned x) {cerr << x;}
20+
void __print(unsigned long x) {cerr << x;}
21+
void __print(unsigned long long x) {cerr << x;}
22+
void __print(float x) {cerr << x;}
23+
void __print(double x) {cerr << x;}
24+
void __print(long double x) {cerr << x;}
25+
void __print(char x) {cerr << '\'' << x << '\'';}
26+
void __print(const char *x) {cerr << '"' << x << '"';}
27+
void __print(const string &x) {cerr << '"' << x << '"';}
28+
void __print(bool x) {cerr << (x ? "true" : "false");}
29+
30+
template<typename T, typename V>
31+
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
32+
template<typename T>
33+
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
34+
void _print() {cerr << "]\n";}
35+
template <typename T, typename... V>
36+
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
37+
#ifndef ONLINE_JUDGE
38+
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
39+
#else
40+
#define debug(x...)
41+
#endif
42+
43+
void setIO(string s = "") {
44+
ios_base::sync_with_stdio(0);
45+
cin.tie(0);
46+
if ((int)s.size()) {
47+
freopen((s + ".in").c_str(), "r", stdin);
48+
freopen((s + ".out").c_str(), "w", stdout);
49+
}
50+
}
51+
52+
int main() {
53+
return 0;
54+
}

‎usaco/silver/loan

53.7 KB
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