View Compilation Error

0_0_38642006_6678.cpp: In function 'int main()':
0_0_38642006_6678.cpp:19:9: error: 'cin' was not declared in this scope
         cin>>n;
         ^~~
0_0_38642006_6678.cpp:19:9: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_38642006_6678.cpp:3:1:
+#include <iostream>
 using namespace std;
0_0_38642006_6678.cpp:19:9:
         cin>>n;
         ^~~