View Compilation Error

0_0_13934140_2431.cpp: In function 'void sol(int)':
0_0_13934140_2431.cpp:121:13: error: 'cout' was not declared in this scope
             cout>>ans>>endl;
             ^
0_0_13934140_2431.cpp:121:24: error: 'endl' was not declared in this scope
             cout>>ans>>endl;
                        ^