Cod sursa(job #1039645)
Utilizator | Data | 23 noiembrie 2013 12:54:34 | |
---|---|---|---|
Problema | Grigo | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.4 kb |
#include <cstdio>
using namespace std;
bool viz[100000]={0};
int n,m,i,arg;
long long sol=1;
int main () {
freopen ("grigo.in", "r", stdin);
freopen ("grigo.out", "w", stdout);
scanf ("%d %d", &n, &m);
for (i=1; i<=m; i++){
scanf ("%d", &arg);
viz [arg]=1;
}
for (i=1; i<=n; i++) {
if (viz[i]==0) sol=sol*(i-1);
}
printf ("%lld", sol);
return 0;
}