func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, k;   int log2(long long x) {     int ret = 0;     while (x > 0) {       x /= 2;       ret++;     }     return ret;   }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     clock_t ck;     ck = clock();     cin >> n >> k;     if (k == 1) {       cout << n <<   n ;       return 0;     }     int exp = log2(n);     cout << (1ll << exp) - 1 <<   n ;     ck = clock() - ck;     cerr <<  It took   << 1.0 * ck / CLOCKS_PER_SEC <<   sec n ;     return 0;   }   