View Compilation Error

0_0_37761519_6527.cpp: In function 'int main()':
0_0_37761519_6527.cpp:46:5: error: 'll' was not declared in this scope
     ll ans=0;
     ^
0_0_37761519_6527.cpp:53:3: error: 'cout' was not declared in this scope
   cout<<ans<<endl;
   ^
0_0_37761519_6527.cpp:53:14: error: 'endl' was not declared in this scope
   cout<<ans<<endl;
              ^