#include<stdio.h> int main() { //输入整数n,h,m int n,h,m; //多组输入,注意输入的整数之间有空格 while(scanf("%d %d %d",&n,&h,&m)!=EOF) { if(m%h==0) printf("%d\n",n-(m/h)); else printf("%d\n",n-(m/h)-1); } return 0; }