题解 | 数位五五

#include <stdio.h>

int found(int a,int b){
int count = 0;
int i = 0;
int flag = 0;
for(i = a;i<=b;i++){
    count = 0;
    int num = i;
while(num>0)
{
   count+=num%10; 
   num/=10;
}  
if(count%5==0){
        flag++;
    }
}
return flag;
}

int main() {
    int x = 0;
    int y = 0;
    scanf("%d %d",&x,&y);
    int count = found(x,y);
    printf("%d",count);
    return 0;
}