Cod sursa(job #1205745)
Utilizator | Pavlov Ion pavlov.ion | Data | 7 iulie 2014 22:56:03 |
---|---|---|---|
Problema | Sum | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.45 kb |
#include<stdio.h>
long long N,X,phi[100005];
int main() {
freopen("sum.in","r",stdin);
freopen("sum.out","r",stdout);
long long i,j;
for(i=1;i<=100000;i++)
phi[i]=i-1;
for(i=2;i<=100000;i++)
for(j=2*i;j<=100000;j+=i)
phi[j]-=phi[i];
scanf("%d",&N);
for(i=1;i<=N;i++){
scanf("%d",&X);
printf("%d",2*phi[X]*X);
printf("\n");
}
return 0;
}