Cod sursa(job #810768)

Utilizator lilian_ciobanuLilian Ciobanu lilian_ciobanu Data 10 noiembrie 2012 23:11:59
Problema Sum Scor 70
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
#include<fstream>
#define max 100001
using namespace std;
main(){
int phi[max],i,j,n, t;
for (int i = 1; i <= max; ++i)
    phi[i] = i-1;
for (int i = 2; i <= max; ++i)
    for (int j = 2*i; j <= max; j += i)
        phi[j] -= phi[i];
ifstream f("sum.in");
ofstream g("sum.out");
f>>n;
for(i=1; i<=n; i++){
f>>t;
g<<2*phi[t]*t<<"\n";
}
}