oj.uz

Submission #345384

# Submission time Handle Problem Language Result Execution time Memory
345384 2021-01-07T08:18:37 Z vonatlus Marriage questions (IZhO14_marriage) C++14
80 / 100
 1500 ms 6960 KB 
/// wa 

#pragma GCC optimize("O3")
//#pragma comment(linker, "/STACK:36777216")

#include<bits/stdc++.h>

#define x first
#define y second
#define pb push_back
#define sz(x) (int) x.size()
#define all(z) (z).begin(), (z).end()
 
using namespace std;

using ll = long long;
using pii = pair<int, int>;                                   

const int MOD = 1e9 + 7; 
const int INF = 1e9 + 1e2;
  
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void fin() {
#ifdef AM
    freopen(".in", "r", stdin);
#endif        
}                   

const bool flag = 0;

const int N = 1e5+10;

int was[N];

int mt[N], p[N], tmp;

vector<int> adj[N], g[N];
                     
bool dfs(int x) {
    if (was[x] == tmp) {
        return 0;
    }
    was[x] = tmp;
    for (int to : adj[x]) {
        if (mt[to] == -1) {
            mt[to] = x;
            p[x] = to;
            return 1;
        }
    }
    for (int to : adj[x]) {
        if (dfs(mt[to])) {
            mt[to] = x;
            p[x] = to;
            return 1;
        }
    }
    return 0;
}

int n, m, k;

bool check(int l, int r) {
    for (int i = 0; i < m; ++i) {
        adj[i].clear();
        p[i] = -1;
    }
    for (int i = l; i <= r; ++i) {
        for (int to : g[i]) {
            adj[to].pb(i);
        }
    }
    for (int i = 0; i < m; ++i) {
        tmp++;
        dfs(i);
    }
    int ok = 1;
    for (int i = 0; i < m; ++i) {
        if (p[i] == -1) {
            ok = 0;
        } else {
            mt[p[i]] = -1;
        }
    }
    return ok;
}

void ma1n() {
    cin >> n >> m >> k;
    for (int u, v; k--;) {
        cin >> u >> v;
        u--, v--;
        g[u].pb(v);
    }
    ll ans = 0;
    memset(mt, -1, sizeof(mt));
    for (int i = 0; i < n; ++i) {
        int l = i;
        int r = n-1;
        int j = -1;            
        while (l <= r) {
            int mid = l+r >> 1;
            if (check(i, mid)) {
                j = mid, r = mid-1;        
            } else {
                l = mid+1;
            }
        }
        if (~j) {
            ans += n-j;
        } else break;
    }
    cout << ans;
} 

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr), fin();
    int ts = 1;
    if (flag) {
        cin >> ts;
    }
    while (ts--) {
        ma1n(); 
    }
    return 0;
}

Compilation message

marriage.cpp: In function 'void ma1n()':
marriage.cpp:103:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  103 |             int mid = l+r >> 1;
      |                       ~^~

Subtask #1
80.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5484 KB Output is correct
2 Correct 4 ms 5484 KB Output is correct
3 Correct 4 ms 5484 KB Output is correct
4 Correct 4 ms 5484 KB Output is correct
5 Correct 4 ms 5484 KB Output is correct
6 Correct 6 ms 5484 KB Output is correct
7 Correct 5 ms 5484 KB Output is correct
8 Correct 4 ms 5484 KB Output is correct
9 Correct 7 ms 5484 KB Output is correct
10 Correct 4 ms 5484 KB Output is correct
11 Correct 5 ms 5484 KB Output is correct
12 Correct 4 ms 5484 KB Output is correct
13 Correct 4 ms 5484 KB Output is correct
14 Correct 4 ms 5484 KB Output is correct
15 Correct 4 ms 5484 KB Output is correct
16 Correct 4 ms 5484 KB Output is correct
17 Correct 4 ms 5484 KB Output is correct
18 Correct 4 ms 5484 KB Output is correct
19 Correct 14 ms 5528 KB Output is correct
20 Correct 8 ms 5484 KB Output is correct
21 Correct 4 ms 5484 KB Output is correct
22 Correct 6 ms 5484 KB Output is correct
23 Correct 6 ms 5484 KB Output is correct
24 Correct 6 ms 5484 KB Output is correct
25 Correct 291 ms 5628 KB Output is correct
26 Correct 60 ms 5484 KB Output is correct
27 Correct 5 ms 5484 KB Output is correct
28 Correct 12 ms 5484 KB Output is correct
29 Correct 57 ms 5600 KB Output is correct
30 Correct 42 ms 5484 KB Output is correct
31 Execution timed out 1580 ms 6076 KB Time limit exceeded
32 Correct 251 ms 5596 KB Output is correct
33 Correct 4 ms 5484 KB Output is correct
34 Correct 63 ms 5484 KB Output is correct
35 Execution timed out 1571 ms 6500 KB Time limit exceeded
36 Execution timed out 1574 ms 6508 KB Time limit exceeded
37 Execution timed out 1579 ms 6124 KB Time limit exceeded
38 Correct 785 ms 6784 KB Output is correct
39 Execution timed out 1568 ms 5740 KB Time limit exceeded
40 Correct 10 ms 5740 KB Output is correct
41 Execution timed out 1587 ms 5868 KB Time limit exceeded
42 Correct 169 ms 5996 KB Output is correct
43 Correct 322 ms 6124 KB Output is correct
44 Correct 441 ms 6652 KB Output is correct
45 Execution timed out 1591 ms 6208 KB Time limit exceeded
46 Execution timed out 1563 ms 6896 KB Time limit exceeded
47 Correct 807 ms 6916 KB Output is correct
48 Correct 619 ms 6916 KB Output is correct
49 Execution timed out 1572 ms 6960 KB Time limit exceeded
50 Execution timed out 1568 ms 5740 KB Time limit exceeded