Cod sursa(job #627943)
Utilizator | Data | 31 octombrie 2011 00:06:18 | |
---|---|---|---|
Problema | Sum | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.41 kb |
#include <cstdio>
#define file_in "sum.in"
#define file_out "sum.out"
#define nmax 100000
int T,i,j,v[nmax],N;
int main(){
freopen(file_in,"r",stdin);
freopen(file_out,"w",stdout);
scanf("%d", &T);
for (i=1;i<=nmax;++i)
v[i]=i-1;
for (i=2;i<=nmax;++i)
for (j=i+i;j<=nmax;j+=i)
v[j]-=v[i];
while(T--){
scanf("%d", &N);
printf("%lld\n", v[N]*N*2);
}
return 0;
}