結果
| 問題 |
No.2277 Honest or Dishonest ?
|
| コンテスト | |
| ユーザー |
Forested
|
| 提出日時 | 2023-04-21 21:36:57 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 49 ms / 2,000 ms |
| コード長 | 4,309 bytes |
| コンパイル時間 | 1,372 ms |
| コンパイル使用メモリ | 126,596 KB |
| 最終ジャッジ日時 | 2025-02-12 11:11:28 |
|
ジャッジサーバーID (参考情報) |
judge3 / 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
#ifndef LOCAL
#define FAST_IO
#endif
#define INT128
// ============
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cmath>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#define OVERRIDE(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i)
#define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i)
#define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i)
#define ALL(x) begin(x), end(x)
using namespace std;
using u32 = unsigned int;
using u64 = unsigned long long;
using i32 = signed int;
using i64 = signed long long;
using f64 = double;
using f80 = long double;
template <typename T>
using Vec = vector<T>;
template <typename T>
bool chmin(T &x, const T &y) {
if (x > y) {
x = y;
return true;
}
return false;
}
template <typename T>
bool chmax(T &x, const T &y) {
if (x < y) {
x = y;
return true;
}
return false;
}
template <typename T>
Vec<tuple<i32, i32, T>> runlength(const Vec<T> &a) {
if (a.empty()) {
return Vec<tuple<i32, i32, T>>();
}
Vec<tuple<i32, i32, T>> ret;
i32 prv = 0;
REP(i, 1, a.size()) {
if (a[i - 1] != a[i]) {
ret.emplace_back(prv, i, a[i - 1]);
prv = i;
}
}
ret.emplace_back(prv, (i32)a.size(), a.back());
return ret;
}
#ifdef INT128
using u128 = __uint128_t;
using i128 = __int128_t;
istream &operator>>(istream &is, i128 &x) {
i64 v;
is >> v;
x = v;
return is;
}
ostream &operator<<(ostream &os, i128 x) {
os << (i64)x;
return os;
}
istream &operator>>(istream &is, u128 &x) {
u64 v;
is >> v;
x = v;
return is;
}
ostream &operator<<(ostream &os, u128 x) {
os << (u64)x;
return os;
}
#endif
[[maybe_unused]] constexpr i32 INF = 1000000100;
[[maybe_unused]] constexpr i64 INF64 = 3000000000000000100;
struct SetUpIO {
SetUpIO() {
#ifdef FAST_IO
ios::sync_with_stdio(false);
cin.tie(nullptr);
#endif
cout << fixed << setprecision(15);
}
} set_up_io;
// ============
#ifdef DEBUGF
#else
#define DBG(x) (void)0
#endif
// ============
#include <cassert>
#include <utility>
#include <vector>
class UnionFind {
std::vector<int> par;
int _root(int v) {
if (par[v] < 0) {
return v;
} else {
return par[v] = _root(par[v]);
}
}
public:
UnionFind(int n) : par(n, -1) {}
int root(int v) {
assert(v >= 0 && v < (int) par.size());
return _root(v);
}
int size(int v) {
assert(v >= 0 && v < (int) par.size());
return -par[_root(v)];
}
bool unite(int u, int v) {
assert(u >= 0 && u < (int) par.size() && v >= 0 && v < (int) par.size());
u = _root(u);
v = _root(v);
if (u == v) {
return false;
}
if (par[u] < par[v]) {
std::swap(u, v);
}
par[v] += par[u];
par[u] = v;
return true;
}
bool same(int u, int v) {
assert(u >= 0 && u < (int) par.size() && v >= 0 && v < (int) par.size());
return _root(u) == _root(v);
}
};
// ============
int main() {
i32 n, q;
cin >> n >> q;
Vec<i32> a(q), b(q), c(q);
REP(i, q) {
cin >> a[i] >> b[i] >> c[i];
--a[i];
--b[i];
}
UnionFind uf(2 * n);
REP(i, q) {
if (c[i] == 0) {
uf.unite(a[i], b[i]);
uf.unite(a[i] + n, b[i] + n);
} else {
uf.unite(a[i], b[i] + n);
uf.unite(a[i] + n, b[i]);
}
}
REP(i, n) {
if (uf.same(i, i + n)) {
cout << 0 << '\n';
exit(0);
}
}
i32 comp = n;
uf = UnionFind(n);
REP(i, q) {
comp -= uf.unite(a[i], b[i]);
}
i32 ans = 1;
constexpr i32 MOD = 998244353;
REP(i, comp) {
ans += ans;
if (ans >= MOD) {
ans -= MOD;
}
}
cout << ans << '\n';
}
Forested