oj.uz

Submission #713366

# Submission time Handle Problem Language Result Execution time Memory
713366 2023-03-21T20:02:08 Z YENGOYAN Marriage questions (IZhO14_marriage) C++17
0 / 100
 1500 ms 3028 KB 
/*
                                    //\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\\
                                    \\                                    //
                                    //  271828___182845__904523__53602__  \\
                                    \\  87___47____13______52____66__24_  //
                                    //  97___75____72______47____09___36  \\
                                    \\  999595_____74______96____69___67  //
                                    //  62___77____24______07____66__30_  \\
                                    \\  35___35____47______59____45713__  //
                                    //                                    \\
                                    \\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\//
*/
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <cmath>
#include <climits>
#include <algorithm>
#include <random>
#include <queue>
#include <deque>
#include <iomanip>
#include <string>
#include <tuple>
#include <bitset>
#include <chrono>
#include <ctime>
#include <fstream>
#include <stack>
#include <cstdio>
#include <functional>

using namespace std;
using LL = long long;
const int N = 1e3 + 5;
const LL mod = 998244353, inf = 1e18;

vector<int> dx = { 1, 0, -1, 0, 1, -1, 1, -1 };
vector<int> dy = { 0, -1, 0, 1, -1, 1, 1, -1 };

void solve() {
  int n, m, k; cin >> n >> m >> k;
  vector<vector<int>> gp(n + m);
  for (int i = 0; i < k; ++i) {
    int u, v; cin >> u >> v;
    u += m;
    gp[--u].push_back(--v);
    gp[v].push_back(u);
  }

  int ans = 0;

  vector<int> mt(n + m, -1);
  vector<bool> vis(n + m);

  function<bool(int, int, int)> kuhn = [&](int u, int l, int r) {
    if (vis[u]) return 0;
    vis[u] = 1;
    for (int& v : gp[u]) {
      if (v < l || v > r) continue;
      if (mt[v] == -1 || kuhn(mt[v], l, r)) {
        mt[v] = u;
        return 1;
      }
    }
    return 0;
  };

  int l = m - 2, r = n - 1, idx = -1;
  while (l <= r) {
    int mid = (l + r) / 2;
    
    mt = vector<int>(n + m, -1);

    int cnt = 0;
    for (int i = 0; i < m; ++i) {
      vis = vector<bool>(n + m);
      cnt += kuhn(i, 0, m + mid);
    }
    if(cnt == m){
      r = mid;
      idx = mid;
    }
    else {
      l = mid;
    }
  }

  if (idx == -1) {
    cout << "0\n";
    return;
  }

  ans += n - idx;

  mt = vector<int>(n + m, -1);
  
  for (int i = 0; i < m; ++i) {
    vis = vector<bool>(n + m);
    kuhn(i, m, idx + m);
  }

  for (int i = 0; i < n; ++i) {
    if (mt[i + m] == -1) {
      ans += n - idx;
      continue;
    }

    int u = mt[i + m];
    while (idx < n) {
      vis = vector<bool>(n + m);
      if (kuhn(u, i + 1 + m, idx + m)) break;
      ++idx;
    }
    if (idx == n) break;
    ans += n - idx;
  }

  cout << ans << "\n";
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  //int t; cin >> t; while (t--)
  solve();
}

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1565 ms 212 KB Time limit exceeded
2 Execution timed out 1554 ms 212 KB Time limit exceeded
3 Execution timed out 1572 ms 212 KB Time limit exceeded
4 Execution timed out 1564 ms 212 KB Time limit exceeded
5 Execution timed out 1566 ms 212 KB Time limit exceeded
6 Execution timed out 1568 ms 212 KB Time limit exceeded
7 Execution timed out 1576 ms 212 KB Time limit exceeded
8 Execution timed out 1573 ms 212 KB Time limit exceeded
9 Execution timed out 1566 ms 212 KB Time limit exceeded
10 Execution timed out 1577 ms 212 KB Time limit exceeded
11 Execution timed out 1570 ms 212 KB Time limit exceeded
12 Execution timed out 1577 ms 212 KB Time limit exceeded
13 Execution timed out 1578 ms 212 KB Time limit exceeded
14 Execution timed out 1581 ms 212 KB Time limit exceeded
15 Execution timed out 1583 ms 212 KB Time limit exceeded
16 Execution timed out 1572 ms 212 KB Time limit exceeded
17 Execution timed out 1587 ms 212 KB Time limit exceeded
18 Execution timed out 1561 ms 212 KB Time limit exceeded
19 Execution timed out 1581 ms 340 KB Time limit exceeded
20 Execution timed out 1579 ms 212 KB Time limit exceeded
21 Execution timed out 1571 ms 212 KB Time limit exceeded
22 Execution timed out 1571 ms 212 KB Time limit exceeded
23 Execution timed out 1561 ms 212 KB Time limit exceeded
24 Execution timed out 1571 ms 212 KB Time limit exceeded
25 Execution timed out 1576 ms 468 KB Time limit exceeded
26 Execution timed out 1559 ms 340 KB Time limit exceeded
27 Execution timed out 1572 ms 340 KB Time limit exceeded
28 Execution timed out 1573 ms 340 KB Time limit exceeded
29 Execution timed out 1582 ms 340 KB Time limit exceeded
30 Execution timed out 1580 ms 340 KB Time limit exceeded
31 Execution timed out 1567 ms 980 KB Time limit exceeded
32 Execution timed out 1576 ms 340 KB Time limit exceeded
33 Execution timed out 1579 ms 340 KB Time limit exceeded
34 Execution timed out 1586 ms 340 KB Time limit exceeded
35 Execution timed out 1571 ms 1364 KB Time limit exceeded
36 Execution timed out 1541 ms 1364 KB Time limit exceeded
37 Execution timed out 1563 ms 1072 KB Time limit exceeded
38 Execution timed out 1559 ms 1648 KB Time limit exceeded
39 Execution timed out 1578 ms 1084 KB Time limit exceeded
40 Execution timed out 1566 ms 924 KB Time limit exceeded
41 Execution timed out 1571 ms 1180 KB Time limit exceeded
42 Execution timed out 1569 ms 1364 KB Time limit exceeded
43 Execution timed out 1583 ms 1492 KB Time limit exceeded
44 Execution timed out 1553 ms 2004 KB Time limit exceeded
45 Execution timed out 1573 ms 2260 KB Time limit exceeded
46 Execution timed out 1580 ms 3028 KB Time limit exceeded
47 Execution timed out 1571 ms 2868 KB Time limit exceeded
48 Execution timed out 1574 ms 2772 KB Time limit exceeded
49 Execution timed out 1575 ms 2988 KB Time limit exceeded
50 Execution timed out 1579 ms 1740 KB Time limit exceeded