View Compilation Error

0_0_24963875_5715.cpp: In function 'int solved(int, int)':
0_0_24963875_5715.cpp:25:18: error: invalid operands of types 'int(int)' and 'int' to binary 'operator%'
         return f%2
                  ^
0_0_24963875_5715.cpp:25:18: error: expected ';' at end of input
0_0_24963875_5715.cpp:25:18: error: expected '}' at end of input
0_0_24963875_5715.cpp:25:18: error: expected '}' at end of input