#include <stdio.h> #include <stdlib.h> #include<math.h> int main(){ int a,b,temp; while(scanf("%d %d",&a,&b)!=EOF){ if(a>b){ temp=a; a=b; b=temp; } int i,j,sum=0; for(i=a+1;i<b;i++){ if(i==1) continue; int flag=1; for(j=2;j<=sqrt(i);j++){ if(i%j==0){ flag=0; break; } } if(flag==1) sum+=i; } printf("%d\n",sum); } } |
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