#include<stdio.h> #include<string.h> #include<stdlib.h> #include<math.h> int isPrime(long a){ if(a==1||a==0){ return 0; } for(long i=2;i<=sqrt(a);i++){ if(a%i==0){ return 0; } } return 1; } long long sumPrime(long a,long b){ long long sum=0; for(long i=a+1;i<b;i++){ if(isPrime(i)){ sum+=i; } } return sum; } int main(){ long a,b; while(scanf("%ld %ld",&a,&b)!=EOF){ printf("%lld\n",sumPrime(a,b)); } } |
Double click to view unformatted code.