View Compilation Error

0_0_36851326_30575.cpp: In function 'int main()':
0_0_36851326_30575.cpp:80:5: error: incomplete type 'std::ios {aka std::basic_ios<char>}' used in nested name specifier
     ios::sync_with_stdio(false);
     ^
0_0_36851326_30575.cpp:81:5: error: 'cin' was not declared in this scope
     cin.tie(0);
     ^
0_0_36851326_30575.cpp:108:24: error: 'cout' was not declared in this scope
   for(int i=0;i<m;++i) cout<<ans[i]<<endl;
                        ^
0_0_36851326_30575.cpp:108:38: error: 'endl' was not declared in this scope
   for(int i=0;i<m;++i) cout<<ans[i]<<endl;
                                      ^