题解 | #KiKi和酸奶#

#include <stdio.h>

int main() {
    int n, h, m;
    scanf("%d %d %d", &n, &h, &m);
    if(m%h == 0){
        printf("%d", n-m/h);
    }
    else{
        printf("%d", n-m/h-1);
    }
    
    return 0;
}