oj.uz

Submission #582065

# Submission time Handle Problem Language Result Execution time Memory
582065 2022-06-23T10:52:39 Z FatihSolak Marriage questions (IZhO14_marriage) C++17
100 / 100
 740 ms 1780 KB 
#include <bits/stdc++.h>
#define N 30005
using namespace std;
vector<int> adj[N];
int mt[N];
int l,r;
bool vis[N];
void reset(int x){
    for(int i = 0;i<=x;i++){
        vis[i] = 0;
    }
}
bool try_kuhn(int v){
    if(vis[v])
        return 0;
    vis[v] = 1;
    for(auto u:adj[v]){
        if(u < l || r < u)continue;
        if(mt[u] == 0 || try_kuhn(mt[u])){
            mt[u] = v;
            return 1;
        }
    }
    return 0;
}
void solve(){
    int n,m,k;
    cin >> n >> m >> k;
    for(int i = 1;i<=k;i++){
        int u,v;
        cin >> u >> v;
        adj[v].push_back(u);
    }
    set<int> unmatched;
    for(int i = 1;i<=m;i++){
        unmatched.insert(i);
    }
    r = 0;
    int ans = 0;
    for(int i = 1;i<=n;i++){
        l = i;
        reset(m);
        while(unmatched.size() && try_kuhn(*unmatched.begin())){
            reset(m);
            unmatched.erase(unmatched.begin());
        }
        while(r != n && unmatched.size()){
            r++;
            reset(m);
            while(unmatched.size() && try_kuhn(*unmatched.begin())){
                reset(m);
                unmatched.erase(unmatched.begin());
            }
        }
        if(r == n && unmatched.size())break;
        ans += n - r + 1;
        if(mt[i]){
            unmatched.insert(mt[i]);
        }
    }
    cout << ans;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
        freopen("in.txt","r",stdin);
        freopen("out.txt","w",stdout);
    #endif
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    #ifdef Local
        cout << endl << fixed << setprecision(2) << 1000.0*clock()/CLOCKS_PER_SEC << " milliseconds.";
    #endif
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 980 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 980 KB Output is correct
11 Correct 1 ms 980 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 980 KB Output is correct
14 Correct 1 ms 980 KB Output is correct
15 Correct 1 ms 980 KB Output is correct
16 Correct 1 ms 980 KB Output is correct
17 Correct 1 ms 980 KB Output is correct
18 Correct 1 ms 980 KB Output is correct
19 Correct 2 ms 980 KB Output is correct
20 Correct 1 ms 980 KB Output is correct
21 Correct 1 ms 980 KB Output is correct
22 Correct 1 ms 980 KB Output is correct
23 Correct 1 ms 980 KB Output is correct
24 Correct 1 ms 980 KB Output is correct
25 Correct 32 ms 1144 KB Output is correct
26 Correct 4 ms 1072 KB Output is correct
27 Correct 1 ms 980 KB Output is correct
28 Correct 2 ms 980 KB Output is correct
29 Correct 3 ms 980 KB Output is correct
30 Correct 2 ms 980 KB Output is correct
31 Correct 229 ms 1456 KB Output is correct
32 Correct 2 ms 1108 KB Output is correct
33 Correct 1 ms 980 KB Output is correct
34 Correct 4 ms 1108 KB Output is correct
35 Correct 58 ms 1580 KB Output is correct
36 Correct 43 ms 1492 KB Output is correct
37 Correct 740 ms 1504 KB Output is correct
38 Correct 15 ms 1620 KB Output is correct
39 Correct 86 ms 1260 KB Output is correct
40 Correct 4 ms 1236 KB Output is correct
41 Correct 6 ms 1236 KB Output is correct
42 Correct 10 ms 1236 KB Output is correct
43 Correct 10 ms 1324 KB Output is correct
44 Correct 19 ms 1620 KB Output is correct
45 Correct 11 ms 1368 KB Output is correct
46 Correct 22 ms 1764 KB Output is correct
47 Correct 19 ms 1760 KB Output is correct
48 Correct 17 ms 1748 KB Output is correct
49 Correct 29 ms 1780 KB Output is correct
50 Correct 203 ms 1312 KB Output is correct