#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 1e5+5;
int ed[N], st[N], n, m, k, love[N];
bool vis[N], vis1[N], mark[N];
vector<int> adj[N], g[N];
bool check(vector<int> &v){
int cnt = 0;
for(auto &i : v)
cnt += !mark[i], mark[i] = 1;
for(auto &i : v)
mark[i] = 0;
return (cnt == m);
}
bool kuhn(int x){
if(vis[x]) return 0;
vis[x] = 1;
for(auto i : adj[x])
if(love[i] == -1 or kuhn(love[i])){
love[i] = x;
return 1;
}
return 0;
}
int main(){
// freopen("file.in", "r", stdin);
scanf("%d%d%d", &n, &m, &k);
for(int i = 1; i <= k; ++i){
int a, b;
scanf("%d%d", &a, &b);
g[a].push_back(b);
}
int answer = 0;
for(int l = 1; l <= n; ++l){
vector<int> v;
for(int r = l; r <= n; ++r){
for(auto &i : g[r])
v.pb(i);
if(!check(v))
continue;
for(auto &i : g[r])
adj[r].pb(i);
for (int j = 1; j <= m; j++)
love[j] = -1;
// Improved Kuhn starts here
for (int j = l; j <= r; j++)
vis1[j] = 0;
for (int j = l; j <= r; j++)
for (int to : adj[j])
if (love[to] == -1) {
love[to] = j;
vis1[j] = true;
break;
}
for (int i = l; i <= r; i++){
if (vis1[i])
continue;
// Improved Kuhn ends here
for (int j = l; j <= r; j++)
vis[j] = 0;
kuhn(i);
}
bool ok = 1;
for (int i = 1; i <= m and ok; i++)
ok &= (love[i] != -1);
answer += ok;
}
for (int i = 1; i <= n; i++)
adj[i].clear();
}
printf("%d\n", answer);
return 0;
}
Compilation message
marriage.cpp: In function 'int main()':
marriage.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
42 | scanf("%d%d%d", &n, &m, &k);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~
marriage.cpp:45:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
45 | scanf("%d%d", &a, &b);
| ~~~~~^~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
4956 KB |
Output isn't correct |
| 2 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 3 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 4 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 5 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 6 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 7 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 8 |
Correct |
2 ms |
4956 KB |
Output is correct |
| 9 |
Correct |
2 ms |
4956 KB |
Output is correct |
| 10 |
Correct |
2 ms |
4956 KB |
Output is correct |
| 11 |
Correct |
2 ms |
4956 KB |
Output is correct |
| 12 |
Correct |
3 ms |
5212 KB |
Output is correct |
| 13 |
Correct |
2 ms |
4952 KB |
Output is correct |
| 14 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 15 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 16 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 17 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 18 |
Incorrect |
2 ms |
4956 KB |
Output isn't correct |
| 19 |
Incorrect |
37 ms |
5204 KB |
Output isn't correct |
| 20 |
Incorrect |
6 ms |
4956 KB |
Output isn't correct |
| 21 |
Correct |
2 ms |
4956 KB |
Output is correct |
| 22 |
Incorrect |
3 ms |
4956 KB |
Output isn't correct |
| 23 |
Incorrect |
5 ms |
4956 KB |
Output isn't correct |
| 24 |
Incorrect |
4 ms |
4956 KB |
Output isn't correct |
| 25 |
Execution timed out |
1600 ms |
5308 KB |
Time limit exceeded |
| 26 |
Execution timed out |
1537 ms |
5188 KB |
Time limit exceeded |
| 27 |
Correct |
39 ms |
4956 KB |
Output is correct |
| 28 |
Incorrect |
190 ms |
5204 KB |
Output isn't correct |
| 29 |
Incorrect |
861 ms |
5308 KB |
Output isn't correct |
| 30 |
Incorrect |
664 ms |
5292 KB |
Output isn't correct |
| 31 |
Execution timed out |
1542 ms |
5840 KB |
Time limit exceeded |
| 32 |
Execution timed out |
1531 ms |
5212 KB |
Time limit exceeded |
| 33 |
Correct |
119 ms |
4956 KB |
Output is correct |
| 34 |
Incorrect |
1134 ms |
4956 KB |
Output isn't correct |
| 35 |
Execution timed out |
1556 ms |
6704 KB |
Time limit exceeded |
| 36 |
Execution timed out |
1559 ms |
6572 KB |
Time limit exceeded |
| 37 |
Execution timed out |
1545 ms |
6092 KB |
Time limit exceeded |
| 38 |
Execution timed out |
1568 ms |
6716 KB |
Time limit exceeded |
| 39 |
Execution timed out |
1566 ms |
5244 KB |
Time limit exceeded |
| 40 |
Execution timed out |
1573 ms |
5376 KB |
Time limit exceeded |
| 41 |
Execution timed out |
1539 ms |
5968 KB |
Time limit exceeded |
| 42 |
Execution timed out |
1551 ms |
5672 KB |
Time limit exceeded |
| 43 |
Execution timed out |
1563 ms |
5840 KB |
Time limit exceeded |
| 44 |
Execution timed out |
1577 ms |
6356 KB |
Time limit exceeded |
| 45 |
Execution timed out |
1576 ms |
5780 KB |
Time limit exceeded |
| 46 |
Execution timed out |
1561 ms |
6236 KB |
Time limit exceeded |
| 47 |
Execution timed out |
1556 ms |
6504 KB |
Time limit exceeded |
| 48 |
Execution timed out |
1545 ms |
6616 KB |
Time limit exceeded |
| 49 |
Execution timed out |
1581 ms |
6736 KB |
Time limit exceeded |
| 50 |
Execution timed out |
1563 ms |
5212 KB |
Time limit exceeded |
