Cod sursa(job #2788916)
Utilizator | Data | 26 octombrie 2021 17:50:19 | |
---|---|---|---|
Problema | Triplete | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.46 kb |
#include<fstream>
using namespace std;
ifstream F("triplete.in");
ofstream G("triplete.out");
int n,m,a[65537],b[65537],i,j,t,c[4097][130],r,l;
int main()
{
for(F>>n>>m,i=1;i<=m;++i) {
F>>a[i]>>b[i];
if(a[i]>b[i])
swap(a[i],b[i]);
c[a[i]][b[i]/32]+=(1<<(b[i]%32));
}
for(i=1;i<=m;++i)
for(j=0;j<=n/32;++j,t+=l)
for(l=0,r=c[a[i]][j]&c[b[i]][j];r;++l,r&=(r-1));
G<<t;
return 0;
}