結果
問題 | No.2277 Honest or Dishonest ? |
ユーザー |
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提出日時 | 2023-04-21 21:42:31 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 102 ms / 2,000 ms |
コード長 | 3,918 bytes |
コンパイル時間 | 1,094 ms |
コンパイル使用メモリ | 122,184 KB |
最終ジャッジ日時 | 2025-02-12 11:17:50 |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 50 |
ソースコード
#include <iostream>#include <vector>#include <algorithm>#include <map>#include <queue>#include <set>#include <random>#include <iomanip>#include <string>#include <cmath>#include <complex>using namespace std;typedef long long ll;#define rep(i, n) for(int i = 0; i < (n); i++)template<class T>using vi = vector<T>;template<class T>using vii = vector<vi<T>>;template<class T>using viii = vector<vii<T>>;using P = pair<ll, int>;void chmin(ll & x, ll y) { x = min(x, y); }struct mint {const long long mod = 998244353;long long x;mint(long long x_ = 0) : x((x_% mod + mod) % mod) {}mint& operator+=(const mint& other) {x += other.x;if (x >= mod) x -= mod;return *this;}mint& operator-=(const mint& other) {x -= other.x;if (x < 0) x += mod;return *this;}mint& operator*=(const mint& other) {x *= other.x;x %= mod;return *this;}mint& operator+=(const long long n) {return *this += mint(n);}mint& operator-=(const long long n) {return *this -= mint(n);}mint& operator*=(const long long n) {return *this *= mint(n);}mint& operator=(const mint& other) {x = other.x;return *this;}mint& operator=(const long long n) {x = n % mod;return *this;}bool operator==(const mint& other) const {return x == other.x;}bool operator!=(const mint& other) const {return x != other.x;}mint operator-() const {mint res(mod - x);return res;}mint operator+(const mint& other) const {mint res(x);return res += other;}mint operator-(const mint& other) const {mint res(x);return res -= other;}mint operator*(const mint& other) const {mint res(x);return res *= other;}mint operator+(const long long n) const {mint res(x);mint other(n);return res += other;}mint operator-(const long long n) const {mint res(x);mint other(n);return res -= other;}mint operator*(const long long n) const {mint res(x);mint other(n);return res *= other;}mint pow(long long n) const {if (n == 0) return mint(1);mint res = pow(n / 2);res *= res;if (n % 2) res *= *this;return res;}mint inv() const {return pow(mod - 2);}mint& operator/=(const mint& other) {*this *= other.inv();return *this;}mint operator/(const mint& other) const {mint res(x);return res /= other;}};struct status {int to, cost;};using pii = pair<int, int>;int main(){int n, q;cin >> n >> q;vii<status> to(n);rep(i, q) {int a, b, c;cin >> a >> b >> c;a--, b--;to[a].push_back({ b, c });to[b].push_back({ a, c });}vi<int> dist(n, -1);mint ans = 1;rep(i, n) {if (dist[i] >= 0) continue;deque<int> dq;dq.push_front(i);dist[i] = 0;while (!dq.empty()) {int v = dq.front();dq.pop_front();for (status nv : to[v]) {if (dist[nv.to] >= 0) {if ((dist[nv.to] - dist[v] - nv.cost) % 2 != 0) {cout << 0 << endl;return 0;}else continue;}else {dist[nv.to] = dist[v] + nv.cost;if (nv.cost == 0) dq.push_front(nv.to);else dq.push_back(nv.to);}}}ans *= 2;}cout << ans.x << endl;return 0;}