func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, m, i;   const int maxn = 1e5 + 20;   int arr[maxn];   int main() {     cin >> n >> m;     int x = m;     if (m <= n * 2) {       for (int i = 1; i <= m; i++) {         cout << i <<    ;       }     } else {       for (i = 1; i <= (m - n * 2); i++) {         cout << i + (n * 2) <<     << i <<    ;         arr[i + (n * 2)]++, arr[i]++;       }       for (int i = 1; i <= m; i++) {         if (arr[i] == 0) cout << i <<    ;       }     }     return 0;   }   