View Compilation Error

0_0_25884673_3951.cpp: In function 'int main()':
0_0_25884673_3951.cpp:23:2: error: 'cin' was not declared in this scope
  cin >> T;
  ^
0_0_25884673_3951.cpp:45:3: error: 'cout' was not declared in this scope
   cout << min(n - 1, Max + k);
   ^