func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   const int mod = 1e9 + 7;   const int sz = 1e5 + 10;   int main() {     ll k, b, n, t, z, ans, zz;     while (cin >> k >> b >> n >> t) {       z = 1;       ans = n;       for (int i = 0; i < n && z < t; i++) {         z = z * k + b;         ans--;       }       if (z > t) ans++;       cout << ans <<   n ;     }     return 0;   }   