/in/foo.cc: In function 'void build(int, int, int)':
/in/foo.cc:56:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'void query(int, int, int, int, int)':
/in/foo.cc:66:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'void modify(int, int, int, int, int, bool)':
/in/foo.cc:91:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~
/in/foo.cc: In function 'void getans(int, int, int)':
/in/foo.cc:102:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=l+r>>1;
          ~^~