[코드업] 4566 소수 (C언어)

C언어

#include <stdio.h>
 
int main() {
    int first, second;
    scanf("%d %d", &first, &second);
    int cnt = 0, sum = 0, minNumber = 10000;
    
    for(int i=first; i<=second; i++){
        for(int j=1; j<=i; j++){
            if(i%j==0){
                cnt++;
            }
        }
        if(cnt == 2){
            sum += i;
            if(minNumber > i){
                minNumber = i;
            }
        }
        cnt = 0;
    }
    
    if(sum == 0){
        printf("%d\n%d", -1, minNumber);
    }else{
        printf("%d\n%d", sum, minNumber);
    }
    return 0;
}