View Compilation Error

0_0_27135837_14832.cpp: In function 'int main()':
0_0_27135837_14832.cpp:28:13: error: 'in' was not declared in this scope
             in<<"Yes"<<"\n";
             ^
0_0_27135837_14832.cpp:33:13: error: 'in' was not declared in this scope
             in<<"No"<<"\n";
             ^