题解 | #[NOIP2010]数字统计#
[NOIP2010]数字统计
https://www.nowcoder.com/practice/179d9754eeaf48a1b9a49dc1d438525a
#include <stdio.h>
int main()
{
int m=0,n=0;
int count=0;
scanf("%d%d",&m,&n);
for(int i=m;i<=n;i++)
{
int s=i;
while(s>0)
{
if(s%10==2)
count++;
s/=10;
}
}
printf("%d",count);
return 0;
}
