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