题解 | #数位五五#

#include <stdio.h>
int  judge(int i)
{
     int c,sum=0;
     while(i)
     {
        c = i%10;
        i = i/10;
        sum+=c;
     }
     if(sum%5==0)
     {
        return 1;
     }
     else 
     {
        return 0;
     }
}

int main()
 {
    int a,b,count=0;
    scanf("%d %d",&a,&b);
    for(int i=a;i<=b;i++)
    {
        int ret =  judge(i);
        if(ret)
        {
            count++;
        }
    }
    printf("%d",count);
    return 0;
}