Runtime Error
/in/foo.cc: In member function 'void LineTree::Build(int, int, int)':
/in/foo.cc:72:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=l+r>>1;
~^~
/in/foo.cc: In member function 'void LineTree::Build(int, int, int)':
/in/foo.cc:72:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=l+r>>1;
~^~
