Runtime Error
/in/foo.cc: In function 'void update(int, int, int)':
/in/foo.cc:32:6: warning: unused variable 'mid' [-Wunused-variable]
int mid=(l+r)/2;
^
/in/foo.cc: In function 'void update(int, int, int)':
/in/foo.cc:32:6: warning: unused variable 'mid' [-Wunused-variable]
int mid=(l+r)/2;
^
