/*huypheu
3 3
2
1 2
2 3
*/
#include <bits/stdc++.h>
#define mod 1000000007
using namespace std;
int f[3007][3007];
int prep[9000007];
signed main()
{
int n,m;
cin >> n >> m;
int k;
cin >> k;
prep[0]=1;
for(int i=1;i<=n*m;i++) prep[i]=(prep[i-1]*i)%mod;
int misx=n+1,masx=0,misy=n+1,masy=0;
for(int i=1;i<=k;i++)
{
int a,b;
cin >> a >> b;
misx=min(misx,a);
masx=max(masx,a);
misy=min(misy,b);
masy=max(masy,b);
}
int lx,ly;
if(k==0) lx=0,ly=0;
else lx=masx-misx+1,ly=masy-misy+1;
f[lx][ly]=prep[lx*ly-k];
// cout << f[lx][ly] << endl;
// cout << lx << " " << ly << endl;
for(int i=lx;i<=n;i++)
{
for(int j=ly;j<=m;j++)
{
if(i==lx && j==ly) continue;
if(i>lx) f[i][j]=(f[i][j]+(f[i-1][j]*prep[j])*((i!=n)+1))%mod;
if(j>ly) f[i][j]=(f[i][j]+(f[i][j-1]*prep[i])*((j!=m)+1))%mod;
}
}
cout << f[n][m] << endl;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
72492 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
72492 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
72492 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |