View Compilation Error

0_0_39626967_8113.cpp: In function 'int main()':
0_0_39626967_8113.cpp:28:9: error: 'vector' was not declared in this scope
   28 |         vector <int> ans;
      |         ^~~~~~
0_0_39626967_8113.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | #include<stdio.h>
0_0_39626967_8113.cpp:28:17: error: expected primary-expression before 'int'
   28 |         vector <int> ans;
      |                 ^~~
0_0_39626967_8113.cpp:41:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   41 |             ans.push_back(flag);
      |             ^~~
      |             abs
0_0_39626967_8113.cpp:44:23: error: 'ans' was not declared in this scope; did you mean 'abs'?
   44 |         for(int i=0;i<ans.size();i++)
      |                       ^~~
      |                       abs