View Compilation Error

0_0_29576890_23308.cpp: In function 'int main()':
0_0_29576890_23308.cpp:93:12: error: 'n' was not declared in this scope
     cin >> n;
            ^
0_0_29576890_23308.cpp:94:41: error: 'a' was not declared in this scope
     for (int i = 1; i <= n; i++) cin >> a[i];
                                         ^
0_0_29576890_23308.cpp:97:15: error: 'a' was not declared in this scope
       int k = a[i] - a[i - 1];
               ^
0_0_29576890_23308.cpp:98:7: error: 'ans' was not declared in this scope
       ans[i] = query(1, n, 1, i - k);
       ^
0_0_29576890_23308.cpp:101:41: error: 'ans' was not declared in this scope
     for (int i = 1; i < n; i++) cout << ans[i] << " ";
                                         ^
0_0_29576890_23308.cpp:102:13: error: 'ans' was not declared in this scope
     cout << ans[n] << endl;
             ^