oj.uz

Submission #713372

# Submission time Handle Problem Language Result Execution time Memory
713372 2023-03-21T20:04:33 Z YENGOYAN Marriage questions (IZhO14_marriage) C++17
0 / 100
 1500 ms 3020 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 - 5, r = n, 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 1557 ms 212 KB Time limit exceeded
2 Execution timed out 1572 ms 212 KB Time limit exceeded
3 Execution timed out 1561 ms 212 KB Time limit exceeded
4 Execution timed out 1565 ms 212 KB Time limit exceeded
5 Execution timed out 1574 ms 212 KB Time limit exceeded
6 Execution timed out 1578 ms 212 KB Time limit exceeded
7 Execution timed out 1572 ms 212 KB Time limit exceeded
8 Execution timed out 1576 ms 212 KB Time limit exceeded
9 Execution timed out 1578 ms 212 KB Time limit exceeded
10 Execution timed out 1563 ms 212 KB Time limit exceeded
11 Execution timed out 1577 ms 212 KB Time limit exceeded
12 Execution timed out 1588 ms 212 KB Time limit exceeded
13 Execution timed out 1538 ms 212 KB Time limit exceeded
14 Execution timed out 1569 ms 212 KB Time limit exceeded
15 Execution timed out 1585 ms 212 KB Time limit exceeded
16 Execution timed out 1571 ms 212 KB Time limit exceeded
17 Execution timed out 1573 ms 212 KB Time limit exceeded
18 Execution timed out 1577 ms 212 KB Time limit exceeded
19 Execution timed out 1588 ms 340 KB Time limit exceeded
20 Execution timed out 1556 ms 212 KB Time limit exceeded
21 Execution timed out 1538 ms 212 KB Time limit exceeded
22 Execution timed out 1557 ms 212 KB Time limit exceeded
23 Execution timed out 1572 ms 212 KB Time limit exceeded
24 Execution timed out 1554 ms 212 KB Time limit exceeded
25 Execution timed out 1577 ms 468 KB Time limit exceeded
26 Execution timed out 1574 ms 340 KB Time limit exceeded
27 Execution timed out 1565 ms 340 KB Time limit exceeded
28 Execution timed out 1569 ms 340 KB Time limit exceeded
29 Execution timed out 1573 ms 340 KB Time limit exceeded
30 Execution timed out 1576 ms 340 KB Time limit exceeded
31 Execution timed out 1581 ms 980 KB Time limit exceeded
32 Execution timed out 1574 ms 340 KB Time limit exceeded
33 Execution timed out 1570 ms 340 KB Time limit exceeded
34 Execution timed out 1583 ms 340 KB Time limit exceeded
35 Execution timed out 1563 ms 1364 KB Time limit exceeded
36 Execution timed out 1573 ms 1364 KB Time limit exceeded
37 Execution timed out 1563 ms 1172 KB Time limit exceeded
38 Execution timed out 1567 ms 1620 KB Time limit exceeded
39 Execution timed out 1564 ms 1088 KB Time limit exceeded
40 Execution timed out 1555 ms 980 KB Time limit exceeded
41 Execution timed out 1558 ms 1108 KB Time limit exceeded
42 Execution timed out 1533 ms 1364 KB Time limit exceeded
43 Execution timed out 1542 ms 1496 KB Time limit exceeded
44 Execution timed out 1574 ms 1984 KB Time limit exceeded
45 Execution timed out 1598 ms 2240 KB Time limit exceeded
46 Execution timed out 1570 ms 2900 KB Time limit exceeded
47 Execution timed out 1564 ms 2828 KB Time limit exceeded
48 Execution timed out 1578 ms 2832 KB Time limit exceeded
49 Execution timed out 1582 ms 3020 KB Time limit exceeded
50 Execution timed out 1564 ms 1792 KB Time limit exceeded