#pragma GCC optimize ("O3")
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ll long long
#define ld long double
#define all(a) a.begin(),a.end()
#define ull unsigned long long
#define endl '\n'
#define y1 yaumru
#define ios ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define iter vector<int>::iterator
#define int long long
using namespace std;
using namespace __gnu_pbds;
template<class T>
using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
template<class T>
using ordered_multiset=tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rnd1(chrono::steady_clock::now().time_since_epoch().count());
//find_by_order
//order_of_key
const int N=30000+7;
const int inf=1e18+5;
const int mod=1e9+7;
const ld eps=1e-9;
vector<int>g[N];
bool used[N];
int mt[N];
int n,m;
bool try_kuhn (int v,int l,int r) {
if (used[v]) return false;
used[v] = true;
for (size_t i=0; i<g[v].size(); ++i) {
int to = g[v][i];
if (to<l || to>r)continue;
if (mt[to] == -1 || try_kuhn (mt[to],l,r)) {
mt[to] = v;
return true;
}
}
return false;
}
bool check(int l,int r)
{
fill(mt,mt+n+1,-1);
for (int i=1;i<=m;++i){
fill(used,used+m+1,false);
try_kuhn(i,l,r);
}
int ans=0;
for (int i=1;i<=n;++i){
if (mt[i]!=-1)++ans;
}
if (ans!=m)return false;
return true;
}
main ()
{
ios;
int k;
cin>>n>>m>>k;
for (int i=1;i<=k;++i){
int x,y;
cin>>x>>y;
swap(x,y);
g[x].pb(y);
}
int ans=0;
for (int i=1;i<=n;++i){
for (int j=i;j<=n;++j){
if (check(i,j))++ans;
}
}
cout<<ans<<endl;
}
Compilation message
marriage.cpp:72:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
main ()
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 19 |
Correct |
547 ms |
1272 KB |
Output is correct |
| 20 |
Correct |
86 ms |
1148 KB |
Output is correct |
| 21 |
Correct |
8 ms |
1016 KB |
Output is correct |
| 22 |
Correct |
22 ms |
1016 KB |
Output is correct |
| 23 |
Correct |
167 ms |
1016 KB |
Output is correct |
| 24 |
Correct |
108 ms |
1272 KB |
Output is correct |
| 25 |
Execution timed out |
1546 ms |
1272 KB |
Time limit exceeded |
| 26 |
Execution timed out |
1571 ms |
1144 KB |
Time limit exceeded |
| 27 |
Correct |
272 ms |
1144 KB |
Output is correct |
| 28 |
Execution timed out |
1567 ms |
1016 KB |
Time limit exceeded |
| 29 |
Execution timed out |
1580 ms |
1144 KB |
Time limit exceeded |
| 30 |
Execution timed out |
1560 ms |
1144 KB |
Time limit exceeded |
| 31 |
Execution timed out |
1562 ms |
1660 KB |
Time limit exceeded |
| 32 |
Execution timed out |
1575 ms |
1248 KB |
Time limit exceeded |
| 33 |
Execution timed out |
1564 ms |
1016 KB |
Time limit exceeded |
| 34 |
Execution timed out |
1572 ms |
1144 KB |
Time limit exceeded |
| 35 |
Execution timed out |
1565 ms |
2776 KB |
Time limit exceeded |
| 36 |
Execution timed out |
1573 ms |
2680 KB |
Time limit exceeded |
| 37 |
Execution timed out |
1580 ms |
2040 KB |
Time limit exceeded |
| 38 |
Execution timed out |
1558 ms |
2936 KB |
Time limit exceeded |
| 39 |
Execution timed out |
1563 ms |
1528 KB |
Time limit exceeded |
| 40 |
Execution timed out |
1566 ms |
1400 KB |
Time limit exceeded |
| 41 |
Execution timed out |
1568 ms |
1656 KB |
Time limit exceeded |
| 42 |
Execution timed out |
1551 ms |
1660 KB |
Time limit exceeded |
| 43 |
Execution timed out |
1571 ms |
2168 KB |
Time limit exceeded |
| 44 |
Execution timed out |
1570 ms |
3064 KB |
Time limit exceeded |
| 45 |
Execution timed out |
1576 ms |
2040 KB |
Time limit exceeded |
| 46 |
Execution timed out |
1566 ms |
3064 KB |
Time limit exceeded |
| 47 |
Execution timed out |
1569 ms |
3320 KB |
Time limit exceeded |
| 48 |
Execution timed out |
1554 ms |
3160 KB |
Time limit exceeded |
| 49 |
Execution timed out |
1562 ms |
3452 KB |
Time limit exceeded |
| 50 |
Execution timed out |
1566 ms |
1412 KB |
Time limit exceeded |
