题解 | #KiKi和酸奶#

#include <stdio.h>

int main() {
    int n = 0;
    int m = 0;
    int h = 0;

    while (3 == scanf("%d %d %d", &n, &h, &m))
    {
        printf("%d", (m % h ? (n - m / h - 1): (n - m / h)));
    }
    return 0;
}