#include <bits/stdc++.h>
#define maxn 100010
using namespace std;
long long ans;
int n,m, k, fMatch[maxn], iterNum[maxn], itV;
vector<vector<int> > gr;
bool dfs(int x, int& l, int& r){
if(iterNum[x] == itV){
return 0;
}
iterNum[x] = itV;
for(auto i : gr[x]){
if(i>=l and i <= r and (!fMatch[i] or dfs(fMatch[i], l, r)) ){
fMatch[i] = x;
return 1;
}
}
return 0;
}
int main(){
ios_base::sync_with_stdio(0);
cout.tie(0);
cin.tie(0);
cin >> n >> m >> k;
gr.resize(m+1, vector<int>());
for(int i = 0; i < k; ++i){
int a, b;
cin >> a >> b;
gr[b].push_back(a);
//gr[b].push_back(a);
}
int j = 1;
vector<int> notF;
for(int i = 1; i <= m; ++i){
notF.push_back(i);
}
for(int i = 1; i <= n; ++i){
while(j <= n){
if(!notF.size()){
break;
}
for(int j0 = notF.size()-1; j0 >= 0; --j0){
++itV;if(dfs(notF[j0], i, j)){
notF.pop_back();
} else {
break;
}
}
if(!notF.size()){
break;
}
++j;
//cerr << j << '\n';
}
if(notF.size()){
break;
}
//cerr << j << '\n';
ans += n+1-j;
if(fMatch[i]){
notF.push_back(fMatch[i]);
fMatch[i] = 0;
}
}
cout<<ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
0 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
0 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
2 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
384 KB |
Output is correct |
| 25 |
Correct |
39 ms |
620 KB |
Output is correct |
| 26 |
Correct |
4 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
3 ms |
364 KB |
Output is correct |
| 30 |
Correct |
3 ms |
364 KB |
Output is correct |
| 31 |
Correct |
314 ms |
764 KB |
Output is correct |
| 32 |
Correct |
2 ms |
364 KB |
Output is correct |
| 33 |
Correct |
1 ms |
364 KB |
Output is correct |
| 34 |
Correct |
2 ms |
364 KB |
Output is correct |
| 35 |
Correct |
183 ms |
1004 KB |
Output is correct |
| 36 |
Correct |
131 ms |
1004 KB |
Output is correct |
| 37 |
Correct |
869 ms |
1004 KB |
Output is correct |
| 38 |
Correct |
20 ms |
876 KB |
Output is correct |
| 39 |
Correct |
64 ms |
620 KB |
Output is correct |
| 40 |
Correct |
3 ms |
492 KB |
Output is correct |
| 41 |
Correct |
5 ms |
620 KB |
Output is correct |
| 42 |
Correct |
7 ms |
620 KB |
Output is correct |
| 43 |
Correct |
11 ms |
876 KB |
Output is correct |
| 44 |
Correct |
18 ms |
1004 KB |
Output is correct |
| 45 |
Correct |
8 ms |
748 KB |
Output is correct |
| 46 |
Correct |
28 ms |
1132 KB |
Output is correct |
| 47 |
Correct |
22 ms |
1004 KB |
Output is correct |
| 48 |
Correct |
20 ms |
1004 KB |
Output is correct |
| 49 |
Correct |
27 ms |
1132 KB |
Output is correct |
| 50 |
Correct |
222 ms |
620 KB |
Output is correct |
