func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 40;   void solve() {     long long int n, m, k;     cin >> n >> m >> k;     long long int beg = 1, end = n * m;     long long int fa;     while (beg <= end) {       long long int mid = (beg + end) / 2;       long long int cnt = 0;       for (int i = 1; i <= n; i++) {         cnt += min(m, mid / i);       }       if (cnt >= k) {         end = mid - 1;         fa = mid;       } else         beg = mid + 1;     }     cout << fa <<   n ;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int T = 1;     while (T--) {       solve();       if (T) {         char c;       }     }   }   