func_code_string: #include <bits/stdc++.h>   using namespace std;   long long power(long long x, long long y) {     long long res = 1;     while (y > 0) {       if (y & 1) res = (res * x) % 1000000007;       y = y / 2;       if (y != 0) x = (x * x) % 1000000007;     }     return res;   }   long long ans[2000005], n0[2000005], n1[2000005];   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long t, n, i, j;     cin >> t;     n0[1] = 1, n1[1] = 0, ans[0] = ans[1] = ans[2] = 0, ans[3] = 1;     for (i = 2; i <= 2000000; i++) {       n0[i] = 2 * n1[i - 1] + n0[i - 1];       n0[i] = n0[i] % 1000000007;       n1[i] = n0[i - 1];       if (i >= 4) {         ans[i] = n1[i - 1] + ans[i - 3];         ans[i] = ans[i] % 1000000007;       }     }     while (t--) {       cin >> n;       cout << (4 * ans[n]) % 1000000007 <<   n ;     }     return 0;   }   