View Compilation Error

0_0_39794910_20355.cpp: In function 'int main()':
0_0_39794910_20355.cpp:20:5: error: 'cin' was not declared in this scope
   20 |     cin>>t;
      |     ^~~
0_0_39794910_20355.cpp:4:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    3 | #include<algorithm>
  +++ |+#include <iostream>
    4 | using namespace std;