func_code_string: #include <bits/stdc++.h>   using namespace std;   int next(int a) { return a < 2 ? 1 : (next(a - 2) + (a - 1) / 2); }   int main() {     long int N;     cin >> N;     long int ret = 1;     cout << (N + 1) / 2 << endl;     return 0;   }   