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Cod sursa(job #715668)
#include<stdio.h>
#define MX 100001
FILE *f=fopen("sum.in","r"),*g=fopen("sum.out","w");
long long x,n,sum;
int v[MX];
int main()
{int i,j,k;
fscanf(f,"%lld",&n);
for(k=0;k<n;k++)
{
fscanf(f,"%lld",&x);
sum=1;
for(i=2;i<=x;i++)
{if(x%i==0)
{v[i]==1;
for(j=i*2;j<=2*x;j=j+i)
{v[j]=1;
}
}
else
{if(!v[i])
{sum+=i;
}
}
}
for(i=x+1;i<x*2;i++)
{if(!v[i])
{sum+=i;
}
}
fprintf(g,"%lld\n",sum);
for(i=2;i<=2*x;i++)
{v[i]=0;
}
}
fclose(f);
fclose(g);
return 0;
}