#include <iostream>
using namespace std;
int main() {
int a, b, c;
cin >> a >> b >> c;
a - c / b;
0 <= c < b;
cout << c;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwppbnQgbWFpbigpIHsKIGludCBhLCBiLCBjOwogICAgY2luID4+IGEgPj4gYiA+PiBjOwogICAgYSAtIGMgLyBiOwogICAgMCA8PSBjIDwgYjsKICAgIGNvdXQgPDwgYzsKCXJldHVybiAwOwp9