/in/foo.cc: In function 'void change(int, int, int, int, int, int)':
/in/foo.cc:58:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m=l+r>>1;
         ~^~
/in/foo.cc: In function 'void build(int, int, int)':
/in/foo.cc:70:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m=l+r>>1;
         ~^~
/in/foo.cc: In function 'll query(int, int, int, int, int)':
/in/foo.cc:79:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m=l+r>>1;ll re=0;
        ~^~