View Compilation Error

0_0_39408255_4202.cpp: In function 'int main()':
0_0_39408255_4202.cpp:25:11: error: 'cin' was not declared in this scope
   25 |     while(cin >> n >> m >> k) {
      |           ^~~
0_0_39408255_4202.cpp:3:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    2 | #include <cstring>
  +++ |+#include <iostream>
    3 |