195A - Let's Watch Football - CodeForces Solution

#include <bits/stdc++.h>
#define ll long long
#define e '\n'
using namespace std;


int main(){


//    freopen("input", "r", stdin);
//    freopen("output", "w", stdout);


    ios_base::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
    //be careful this will print the whole output not line by line if you are using \n


    int t = 1;
    //cin >> t;
    while (t--)
    {
        int a, b, c;
        cin >> a >> b >> c;
        int ts = a * c;
        int ws = 0;
        if(ts % b == 0)
            ws = ts/b;
        else
            ws = ts/b +1;
        cout << ws-c;
    }


    return 0;
}