#include<stdio.h>
void main()
{
	int m,n,h,i=1;
	scanf("%d%d%d",&m,&n,&h);
	while(h>0){
		h-=m;
		if(h>0){
			i++;
			h+=n;
		}else{
			break;	
		}	
	}					
	printf("%d",i);							 
} 
/**************************************************************
	Problem: 1074
	User: admin
	Language: C
	Result: Accepted
	Time:10 ms
	Memory:1144 kb
****************************************************************/