View Compilation Error

0_0_26397112_12844.cpp: In function 'int main()':
0_0_26397112_12844.cpp:156:2: error: 'cin' was not declared in this scope
  cin>>t;
  ^
0_0_26397112_12844.cpp:187:3: error: 'cout' was not declared in this scope
   cout<< get.p<<endl;
   ^
0_0_26397112_12844.cpp:187:14: error: 'class pair' has no member named 'p'
   cout<< get.p<<endl;
              ^
0_0_26397112_12844.cpp:187:17: error: 'endl' was not declared in this scope
   cout<< get.p<<endl;
                 ^