/in/foo.cc: In function 'void build(int, int, int)':
/in/foo.cc:32:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     } int mid=l+r>>1;
               ~^~
/in/foo.cc: In function 'void modify(int, int, int, int, int, int)':
/in/foo.cc:49:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=l+r>>1;
             ~^~
/in/foo.cc: In function 'int query(int, int, int, int, int)':
/in/foo.cc:58:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=l+r>>1,ans=0;
             ~^~