数位五五
#include<stdio.h>
int digitsum(int);
int main()
{int a,b,i,tag=0;
scanf("%d%d",&a,&b);
for(i=a;i<=b;i++)
{if(digitsum(i)%5==0)tag++;}
printf("%d",tag);}
int digitsum(int x)
{int sum=0;
while(x>0)
{sum+=x%10;
x/=10;}
return sum;}
int digitsum(int);
int main()
{int a,b,i,tag=0;
scanf("%d%d",&a,&b);
for(i=a;i<=b;i++)
{if(digitsum(i)%5==0)tag++;}
printf("%d",tag);}
int digitsum(int x)
{int sum=0;
while(x>0)
{sum+=x%10;
x/=10;}
return sum;}
