/in/foo.cc: In function 'void build(int&, int, int)':
/in/foo.cc:27:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   p=++pct;int m=l+r>>1;
                 ~^~
/in/foo.cc: In function 'void change(int, int, int, int, int, int)':
/in/foo.cc:36:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m=l+r>>1;
         ~^~
/in/foo.cc: In function 'int query(int, int, int, int)':
/in/foo.cc:46:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   pushdown(p);int m=l+r>>1;
                     ~^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:52:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k;
        ^
/in/foo.cc:52:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k;
          ^