View Compilation Error

0_0_38624550_13246.cpp: In function 'int main()':
0_0_38624550_13246.cpp:7:2: error: 'vector' was not declared in this scope
  vector<int> ans;
  ^~~~~~
0_0_38624550_13246.cpp:7:2: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
0_0_38624550_13246.cpp:2:1:
+#include <vector>
 using namespace std;
0_0_38624550_13246.cpp:7:2:
  vector<int> ans;
  ^~~~~~
0_0_38624550_13246.cpp:7:9: error: expected primary-expression before 'int'
  vector<int> ans;
         ^~~
0_0_38624550_13246.cpp:8:17: error: expected ')' before ';' token
  while (cin >> n;) {
        ~        ^
                 )
0_0_38624550_13246.cpp:8:18: error: expected primary-expression before ')' token
  while (cin >> n;) {
                  ^