View Compilation Error

0_0_22995033_10458.cpp: In function 'void update(int, int, int, int)':
0_0_22995033_10458.cpp:127:9: error: 'm' was not declared in this scope
  if(ql<=m)update(rt*2,ql,qr,value);
         ^
0_0_22995033_10458.cpp:128:8: error: 'm' was not declared in this scope
  if(qr>m)update(rt*2+1,ql,qr,value);
        ^