View Compilation Error

0_0_37794965_22872.cpp: In function 'void solve()':
0_0_37794965_22872.cpp:239:2: error: 'cout' was not declared in this scope
  cout << GetSpg::dis[n] << " " << GetLp::f[GetDag::scc[n]].d << endl;
  ^
0_0_37794965_22872.cpp:239:65: error: 'endl' was not declared in this scope
  cout << GetSpg::dis[n] << " " << GetLp::f[GetDag::scc[n]].d << endl;
                                                                 ^
0_0_37794965_22872.cpp: In function 'int main()':
0_0_37794965_22872.cpp:246:2: error: 'cin' was not declared in this scope
  cin.tie(0);
  ^
0_0_37794965_22872.cpp:247:2: error: 'cout' was not declared in this scope
  cout.tie(0);
  ^
0_0_37794965_22872.cpp:248:2: error: incomplete type 'std::ios {aka std::basic_ios<char>}' used in nested name specifier
  ios::sync_with_stdio(0);
  ^