func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 100;   int mem[MAXN + 10];   int main() {     int N;     cin >> N;     mem[0] = 0, mem[1] = 1, mem[2] = 2, mem[3] = 4;     for (int i = 4; i <= N; ++i) {       mem[i] = i + mem[i - 2];     }     cout << mem[N] <<   n ;   }   