/in/foo.cc: In function 'void build(int&, int, int, int, int)':
/in/foo.cc:17:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=l+r>>1;
             ~^~
/in/foo.cc: In function 'long long int Delete(int&, int, int, int)':
/in/foo.cc:34:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=l+r>>1,ll;
             ~^~
/in/foo.cc: In function 'void insert(int&, int, int, int)':
/in/foo.cc:47:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=l+r>>1;
             ~^~