結果
問題 |
No.1290 Addition and Subtraction Operation
|
ユーザー |
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提出日時 | 2020-11-14 13:58:17 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 116 ms / 2,000 ms |
コード長 | 2,798 bytes |
コンパイル時間 | 2,263 ms |
コンパイル使用メモリ | 204,180 KB |
最終ジャッジ日時 | 2025-01-16 00:33:57 |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 85 |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; using pii = pair<int, int>; template <class T> using V = vector<T>; template <class T> using VV = V<V<T>>; #define pb push_back #define eb emplace_back #define mp make_pair #define fi first #define se second #define rep(i, n) rep2(i, 0, n) #define rep2(i, m, n) for (int i = m; i < (n); i++) #define per(i, b) per2(i, 0, b) #define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--) #define ALL(c) (c).begin(), (c).end() #define SZ(x) ((int)(x).size()) constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); } template <class T, class U> void chmin(T &t, const U &u) { if (t > u) t = u; } template <class T, class U> void chmax(T &t, const U &u) { if (t < u) t = u; } template <class T, class U> ostream &operator<<(ostream &os, const pair<T, U> &p) { os << "(" << p.first << "," << p.second << ")"; return os; } template <class T> ostream &operator<<(ostream &os, const vector<T> &v) { os << "{"; rep(i, v.size()) { if (i) os << ","; os << v[i]; } os << "}"; return os; } #ifdef LOCAL void debug_out() { cerr << endl; } template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << " " << H; debug_out(T...); } #define debug(...) \ cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__) #define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl #else #define debug(...) (void(0)) #define dump(x) (void(0)) #endif class unionfind { vector<int> par, rank; public: void init(int n) { par.resize(n); rank.resize(n); for (int i = 0; i < n; i++) { par[i] = i; rank[i] = 0; } } int find(int x) { if (par[x] == x) return x; else return par[x] = find(par[x]); } void unite(int x, int y) { x = find(x); y = find(y); if (x == y) return; if (rank[x] < rank[y]) par[x] = y; else { par[y] = x; if (rank[x] == rank[y]) ++rank[x]; } } bool same(int x, int y) { return (find(x) == find(y)); } }; int main() { int N, M; cin >> N >> M; V<int> B(N + 2), D(N + 2); rep(i, N) { int x; cin >> x; if (i & 1) x = -x; B[i + 1] = x; } for (int i = 0; i <= N; ++i) { D[i] = B[i + 1] - B[i]; } unionfind uf; uf.init(N + 1); rep(i, M) { int l, r; cin >> l >> r; --l; uf.unite(l, r); } map<int, ll> sum; rep(i, N + 1) sum[uf.find(i)] += D[i]; bool ok = 1; for (auto &p : sum) if (p.se) ok = 0; cout << (ok ? "YES" : "NO") << endl; return 0; }