Cod sursa(job #218719)
| Utilizator | Data | 3 noiembrie 2008 10:56:55 | |
|---|---|---|---|
| Problema | Sum | Scor | 40 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.5 kb |
#include<stdio.h>
#define N 100005
void euler(int x,int v[N]){
int i,j;
for(i=2;i<=x;++i)
if(x%i==0)
for(j=i;j<2*x;j+=i)
v[j]=1;
}
int main(){
int n,x;
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
scanf("%d",&n);
for(;n;--n){
scanf("%d",&x);
int v[N]={0},s=0,j;
euler(x,v);
v[1]=0;
v[x]=1;
for(j=1;j<x*2;++j){
if(!v[j])
s+=j;
//printf("%d %d\n",v[j],j);
}
printf("%d\n",s);
}
fclose(stdin);
fclose(stdout);
return 0;
}
