func_code_string: #include <bits/stdc++.h>   using namespace std;   #pragma GCC optimize( Ofast,no-stack-protector )   #pragma GCC target( sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native )   #pragma GCC optimize( unroll-loops )   int on_bit(int N, int pos) { return N = N | (1 << pos); }   int off_bit(int N, int pos) { return N = N & ~(1 << pos); }   bool check_bit(long long int N, int pos) { return (bool)(N & (1 << pos)); }   template <class T>   inline bool read(T &x) {     int c = getchar();     int sgn = 1;     while (~c && c <  0  || c >  9 ) {       if (c ==  - ) sgn = -1;       c = getchar();     }     for (x = 0; ~c &&  0  <= c && c <=  9 ; c = getchar()) x = x * 10 + c -  0 ;     x *= sgn;     return ~c;   }   int main() {     unsigned long long ar[500005];     memset((ar), 0, sizeof((ar)));     for (unsigned long long i = 3, j = 1; i <= 500001; i += 2, j++) {       ar[i] = ((i * 4) - 4) * j;     }     for (int i = 5; i <= 500001; i += 2) {       ar[i] += ar[i - 2];     }     int ___T;     cin >> ___T;     for (int cs = 1; cs <= ___T; cs++) {       int n;       cin >> n;       cout << ar[n] <<   n ;     }     return 0;   }   