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, count = 0;
scanf("%d %d", &L, &R);
for (int i = L; i <= R; i++) {
int temp = i;
while (temp) {
if (temp % 10 == 2) {
count++;
}
temp /= 10;
}
}
printf("%d", count);
return 0;
}
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