func_code_string: #include <bits/stdc++.h>   using namespace std;   int INTlog2(unsigned long long number) {     int logval = 0;     while (number >>= 1) logval++;     return logval;   }   int main() {     unsigned long long n, k;     cin >> n >> k;     if (k == 1)       cout << n << endl;     else       cout << (1LL << (INTlog2(n) + 1LL)) - 1 << endl;     return 0;   }   