View Compilation Error

0_0_29983772_5942.cpp:1:6: error: 'ios' in namespace 'std' does not name a type
 std::ios::sync_with_stdio(0);      
      ^
0_0_29983772_5942.cpp:2:7: error: 'cin' in namespace 'std' does not name a type
  std::cin.tie(0);     
       ^
0_0_29983772_5942.cpp:3:7: error: 'cout' in namespace 'std' does not name a type
  std::cout.tie(0);
       ^