func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 5;   const long long int MOD = 1e9 + 7;   const long long int INV2 = 500000004;   int A[N][4];   int main(int argc, char const *argv[]) {     cin.sync_with_stdio(0);     cin.tie(0);     int n, m;     cin >> n >> m;     int v = 1;     for (int i = 1; i <= n; i++) {       A[i][0] = v++;       A[i][3] = v++;     }     for (int i = 1; i <= n; i++) {       A[i][1] = v++;       A[i][2] = v++;     }     for (int i = 1; i <= n; i++) {       if (A[i][1] <= m) cout << A[i][1] <<    ;       if (A[i][0] <= m) cout << A[i][0] <<    ;       if (A[i][2] <= m) cout << A[i][2] <<    ;       if (A[i][3] <= m) cout << A[i][3] <<    ;     }     return 0;   }   