View Compilation Error

0_0_33551764_22056.cpp:55:20: error: expected '}' at end of input
   if(p<=mid)chg(x<<1
                    ^
0_0_33551764_22056.cpp: In member function 'void Sgt::chg(int, int, int, int, int)':
0_0_33551764_22056.cpp:55:20: error: expected ')' at end of input
0_0_33551764_22056.cpp:55:20: error: expected '}' at end of input
0_0_33551764_22056.cpp: At global scope:
0_0_33551764_22056.cpp:55:20: error: expected unqualified-id at end of input