/in/foo.cc: In function 'void Bd(int, int, int)':
/in/foo.cc:31:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=l+r>>1;
        ~^~
/in/foo.cc: In function 'long long int Qy(int, int, int, int)':
/in/foo.cc:41:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=t[rt].l+t[rt].r>>1;
        ~~~~~~~^~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:65:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int m=ll+lr>>1;
          ~~^~~
/in/foo.cc:73:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int m=rl+rr>>1;
          ~~^~~