#include <iostream> #include<algorithm> using namespace std; void print_uint128(__int128 num) { if (num == 0) { cout << 0; return; } string s; while (num > 0) { s.push_back('0' + num % 10); num /= 10; } reverse(s.begin(), s.end()); cout << s; } int main() { int n; while(cin >> n){ __int128 result = (static_cast<__int128>(1) << (n + 1)) - 2; print_uint128(result);} return 0; }