/in/foo.cc: In function 'void build(int&, int, int)':
/in/foo.cc:15:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  }int mid=l+r>>1;
           ~^~
/in/foo.cc: In function 'void up(int, int, int, int, int)':
/in/foo.cc:25:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  }int mid=l+r>>1;
           ~^~
/in/foo.cc: In function 'int q(int, int, int, int, int)':
/in/foo.cc:37:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'int c(int, int, int, int)':
/in/foo.cc:49:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'int K(int, int, int, int)':
/in/foo.cc:59:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~