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