/in/foo.cc: In function 'void Build(int, int, int)':
/in/foo.cc:24:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=l+r>>1;
             ~^~
/in/foo.cc: In function 'void pushdown(int, int, int)':
/in/foo.cc:35:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'void modify(int, int, int, int, int)':
/in/foo.cc:46:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=l+r>>1;
             ~^~
/in/foo.cc: In function 'long long int query(int, int, int)':
/in/foo.cc:53:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~