题解 | #[NOIP2010]数字统计#
[NOIP2010]数字统计
https://www.nowcoder.com/practice/179d9754eeaf48a1b9a49dc1d438525a
#include <stdio.h>
int census(int L,int R)
{
int count = 0;
for(int i = L;i<=R;i++)
{
if(i%10==2)
count++;
if(i%100/10==2)
count++;
if(i%1000/100==2)
count++;
if(i%10000/1000==2)
count++;
}
return count;
}
int main() {
int L,R;
scanf("%d %d",&L,&R);
int k = census( L,R);
printf("%d",k);
return 0;
}
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