#include <stdio.h>
int main(void) {
int a, b, c, i, h = 0;
scanf("%d %d %d", &a
, &b
, &c
);
for(i = 0;;i++){
h += a;
if(h >= c){
break;
}
h -= b;
}
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CglpbnQgYSwgYiwgYywgaSwgaCA9IDA7CglzY2FuZigiJWQgJWQgJWQiLCAmYSwgJmIsICZjKTsKCQoJZm9yKGkgPSAwOztpKyspewoJCWggKz0gYTsKCQlpZihoID49IGMpewoJCQlwcmludGYoIiVkIiwgaSArIDEpOwoJCQlicmVhazsKCQl9CgkJaCAtPSBiOwoJfQp9Cg==