#include<stdio.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 sum=0,count=0; for(int i=a+1;i<b;i++) { count=0; if(i==2){ sum+=2; continue; } else{ for(int j=2;j<=sqrt(i);j++){ if(i%j==0){count=1;break;} } if(count==0){ sum+=i; } } } printf("%d\n",sum); } } |
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