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mirror of https://git.sb/baoshuo/OI-codes.git synced 2024-12-24 03:31:59 +00:00

1059. [ZJOI2007]矩阵游戏

https://hydro.ac/d/bzoj/record/63b5630e291ec3514f4c4113
This commit is contained in:
Baoshuo Ren 2023-01-04 19:29:54 +08:00
parent 06464b3d39
commit f62e720b8e
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
21 changed files with 118 additions and 0 deletions

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#include <iostream>
#include <functional>
#include <vector>
using std::cin;
using std::cout;
const char endl = '\n';
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin >> t;
while (t--) {
int n;
cin >> n;
int ans = 0;
std::vector<int> tag(n, -1), match(n, -1);
std::vector<std::vector<int>> g(n);
for (int i = 0; i < n; i++) {
for (int j = 0, x; j < n; j++) {
cin >> x;
if (x) g[i].emplace_back(j);
}
}
std::function<bool(int, int)> dfs = [&](int u, int t) {
if (tag[u] == t) return false;
tag[u] = t;
for (int v : g[u]) {
if (match[v] == -1 || dfs(match[v], t)) {
match[v] = u;
return true;
}
}
return false;
};
for (int i = 0; i < n; i++) {
if (dfs(i, i)) ans++;
}
cout << (ans == n ? "Yes" : "No") << endl;
}
return 0;
}

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