#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;
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
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
2 ms |
980 KB |
Output isn't correct |
2 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
3 |
Correct |
2 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
1036 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
1036 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
1 ms |
1036 KB |
Output is correct |
12 |
Correct |
1 ms |
1076 KB |
Output is correct |
13 |
Correct |
1 ms |
980 KB |
Output is correct |
14 |
Correct |
1 ms |
1036 KB |
Output is correct |
15 |
Correct |
1 ms |
944 KB |
Output is correct |
16 |
Correct |
2 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 |
2 ms |
980 KB |
Output is correct |
23 |
Correct |
1 ms |
928 KB |
Output is correct |
24 |
Correct |
1 ms |
980 KB |
Output is correct |
25 |
Correct |
8 ms |
1108 KB |
Output is correct |
26 |
Incorrect |
2 ms |
980 KB |
Output isn't correct |
27 |
Correct |
2 ms |
980 KB |
Output is correct |
28 |
Correct |
1 ms |
980 KB |
Output is correct |
29 |
Incorrect |
2 ms |
1108 KB |
Output isn't correct |
30 |
Incorrect |
2 ms |
1108 KB |
Output isn't correct |
31 |
Correct |
74 ms |
1728 KB |
Output is correct |
32 |
Incorrect |
2 ms |
1108 KB |
Output isn't correct |
33 |
Correct |
1 ms |
1056 KB |
Output is correct |
34 |
Correct |
6 ms |
1108 KB |
Output is correct |
35 |
Correct |
35 ms |
2264 KB |
Output is correct |
36 |
Correct |
29 ms |
2196 KB |
Output is correct |
37 |
Correct |
166 ms |
1824 KB |
Output is correct |
38 |
Incorrect |
15 ms |
2396 KB |
Output isn't correct |
39 |
Correct |
91 ms |
1272 KB |
Output is correct |
40 |
Correct |
4 ms |
1236 KB |
Output is correct |
41 |
Incorrect |
8 ms |
1452 KB |
Output isn't correct |
42 |
Incorrect |
7 ms |
1432 KB |
Output isn't correct |
43 |
Incorrect |
11 ms |
1748 KB |
Output isn't correct |
44 |
Incorrect |
18 ms |
2508 KB |
Output isn't correct |
45 |
Incorrect |
10 ms |
1636 KB |
Output isn't correct |
46 |
Incorrect |
27 ms |
2552 KB |
Output isn't correct |
47 |
Incorrect |
24 ms |
2676 KB |
Output isn't correct |
48 |
Incorrect |
19 ms |
2644 KB |
Output isn't correct |
49 |
Incorrect |
31 ms |
2688 KB |
Output isn't correct |
50 |
Correct |
222 ms |
1452 KB |
Output is correct |