Cod sursa(job #885661)
Utilizator | onisim necula misino | Data | 22 februarie 2013 11:30:03 |
---|---|---|---|
Problema | Colorare3 | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.41 kb |
#include<fstream>
#define MOD 1000000007
using namespace std;
ifstream f("colorare3.in");
ofstream g("colorare3.out");
int n,i,x,y,j,k,v[100009];
long long sol;
int main()
{
f>>n>>k;
for(i=1;i<n;++i)
{
f>>x>>y;
++v[x];
++v[y];
}
sol=k;
for(i=1;i<=n;++i)
for(j=1;j<v[i];++j)
sol=(1LL*sol*(k-j)),
sol%=MOD;
g<<sol<<'\n';
return 0;
}