#include <bits/stdc++.h>
using namespace std;
inline void fast() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
}
void solve() {
int x, y, z; cin >> x >> y >> z;
int cntr=0;
for(int i=x; i<=200; i+=y) {
if(i==z) break;
cntr++;
}
cout << cntr << endl;
}
int main() {
fast();
solve();
return 0;
}
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