题解 | 数位五五

#include <stdio.h>
int count (int x ,int y)
{
	int count=0;
	for(int i=x;i<=y;i++)
	{
		int sum=0;
	    int m=i;
		while(m!=0)
		{
			sum=sum+m%10;
			m/=10;
		}
		if(sum%5==0)
		{count++;}
	}
	return count;
}
int main() 
{
	int a,b=0;
	scanf("%d %d",&a,&b);
	printf("%d",count(a,b));

return 0;
}