結果
問題 | No.2277 Honest or Dishonest ? |
ユーザー |
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提出日時 | 2023-04-21 21:43:25 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 32 ms / 2,000 ms |
コード長 | 3,954 bytes |
コンパイル時間 | 2,138 ms |
コンパイル使用メモリ | 200,556 KB |
最終ジャッジ日時 | 2025-02-12 11:18:46 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 <bits/stdc++.h>using namespace std;typedef long long ll;#define ALL(x) (x).begin(), (x).end()#ifdef LOCAL#include <debug.hpp>#else#define debug(...) void(0)#endiftemplate <typename T> istream& operator>>(istream& is, vector<T>& v) {for (T& x : v) is >> x;return is;}template <typename T> ostream& operator<<(ostream& os, const vector<T>& v) {for (size_t i = 0; i < v.size(); i++) {os << v[i] << (i + 1 == v.size() ? "" : " ");}return os;}template <typename T> T gcd(T x, T y) { return y != 0 ? gcd(y, x % y) : x; }template <typename T> T lcm(T x, T y) { return x / gcd(x, y) * y; }int topbit(signed t) { return t == 0 ? -1 : 31 - __builtin_clz(t); }int topbit(long long t) { return t == 0 ? -1 : 63 - __builtin_clzll(t); }int botbit(signed a) { return a == 0 ? 32 : __builtin_ctz(a); }int botbit(long long a) { return a == 0 ? 64 : __builtin_ctzll(a); }int popcount(signed t) { return __builtin_popcount(t); }int popcount(long long t) { return __builtin_popcountll(t); }bool ispow2(int i) { return i && (i & -i) == i; }long long MSK(int n) { return (1LL << n) - 1; }template <class T> T ceil(T x, T y) {assert(y >= 1);return (x > 0 ? (x + y - 1) / y : x / y);}template <class T> T floor(T x, T y) {assert(y >= 1);return (x > 0 ? x / y : (x - y + 1) / y);}template <class T1, class T2> inline bool chmin(T1& a, T2 b) {if (a > b) {a = b;return true;}return false;}template <class T1, class T2> inline bool chmax(T1& a, T2 b) {if (a < b) {a = b;return true;}return false;}template <typename T> void mkuni(vector<T>& v) {sort(v.begin(), v.end());v.erase(unique(v.begin(), v.end()), v.end());}template <typename T> int lwb(const vector<T>& v, const T& x) { return lower_bound(v.begin(), v.end(), x) - v.begin(); }const int INF = (1 << 30) - 1;const long long IINF = (1LL << 60) - 1;const int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};const int MOD = 998244353;// const int MOD = 1000000007;template <typename T> struct PotentializedUnionFind {PotentializedUnionFind(int n) : n(n), data(n, -1), dist(n, T()) {}int find(int x) {assert(0 <= x && x < n);if (data[x] < 0) return x;int r = find(data[x]);dist[x] ^= dist[data[x]];return data[x] = r;}bool merge(int x, int y, T p) {p ^= potential(x) ^ potential(y);assert(0 <= x && x < n);assert(0 <= y && y < n);if ((x = find(x)) == (y = find(y))) return false;if (-data[x] < -data[y]) std::swap(x, y);data[x] += data[y];data[y] = x;dist[y] = p;return true;}bool same(int x, int y) {assert(0 <= x && x < n);assert(0 <= y && y < n);return find(x) == find(y);}int size(int x) {assert(0 <= x && x < n);return -data[find(x)];}T potential(int x) {assert(0 <= x && x < n);find(x);return dist[x];}T diff(int x, int y) {assert(0 <= x && x < n);assert(0 <= y && y < n);return potential(y) ^ potential(x);}int operator[](int x) { return find(x); }private:int n;std::vector<int> data;std::vector<T> dist;};#include "atcoder/modint"using mint = atcoder::modint998244353;int main() {cin.tie(0);ios::sync_with_stdio(false);int N, Q;cin >> N >> Q;PotentializedUnionFind<int> UF(N);int cnt = N;for (; Q--;) {int A, B, C;cin >> A >> B >> C;A--, B--;if (UF.same(A, B)) {if (UF.diff(A, B) != C) {cout << 0 << '\n';return 0;}} else {UF.merge(A, B, C);cnt--;}}mint ans = mint(2).pow(cnt);cout << ans.val() << '\n';return 0;}