View Compilation Error

0_0_33425941_7677.cpp: In function 'void update1(int, int, ll)':
0_0_33425941_7677.cpp:37:21: error: expected ']' at end of input
     int mid = (tr[k%5
                     ^
0_0_33425941_7677.cpp:37:21: error: expected ')' at end of input
0_0_33425941_7677.cpp:37:21: error: cannot convert 'node' to 'int' in initialization
0_0_33425941_7677.cpp:37:21: error: expected ',' or ';' at end of input
0_0_33425941_7677.cpp:37:21: error: expected '}' at end of input