/in/foo.cc: In function 'void Update(int, int&, int, int, int, int)':
/in/foo.cc:17:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=L+R>>1;
        ~^~
/in/foo.cc: In function 'int Qmin(int, int, int, int, int)':
/in/foo.cc:25:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=L+R>>1;
        ~^~