View Compilation Error

0_0_32871342_12320.cpp: In function 'int main()':
0_0_32871342_12320.cpp:288:13: error: 'P' has no member named 'f'
     if (ans.f
             ^
0_0_32871342_12320.cpp:288:13: error: expected ')' at end of input
0_0_32871342_12320.cpp:288:13: error: expected statement at end of input
0_0_32871342_12320.cpp:288:13: error: expected '}' at end of input
0_0_32871342_12320.cpp:288:13: error: expected '}' at end of input
0_0_32871342_12320.cpp:288:13: error: expected '}' at end of input
0_0_32871342_12320.cpp:288:13: error: expected '}' at end of input