View Compilation Error

0_0_14653690_21032.cpp: In function 'void extend(int)':
0_0_14653690_21032.cpp:42:29: error: expected primary-expression before '%' token
         if(p->val+1==q->val)%
                             ^
0_0_14653690_21032.cpp:42:29: error: expected primary-expression at end of input
0_0_14653690_21032.cpp:42:29: error: expected '}' at end of input
0_0_14653690_21032.cpp:42:29: error: expected '}' at end of input