题解 | #[NOIP2013]记数问题#
[NOIP2013]记数问题
http://www.nowcoder.com/practice/28b2d9f2bf2c48de94a1297ed90e1732
int main() {
int n, x, sum = 0;
while (scanf("%d %d", &n, &x) != EOF) {
for (int i = 1; i <= n; i++) {
int temp = i;
while (temp) {
if (temp % 10 == x) sum++;
temp /= 10;
}
}
printf("%d", sum);
}
}
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