#include <bits/stdc++.h>   using namespace std;   void fastIO() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.precision(20);   }   int main() {     fastIO();     int n;     int m;     int total;     int day = 0;     cin >> n >> m;     while (n != 0) {       day++;       n = n - 1;       if (day % m == 0) {         n = n + 1;       }     }     cout << day << endl;     return 0;   }   