foo.cc: In function 'void Modify(int&, int, int, int, int)':
foo.cc:17:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |     int mid=l+r>>1;
      |             ~^~
foo.cc: In function 'int Query(int, int, int)':
foo.cc:29:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |     int mid=l+r>>1,sum=0;
      |             ~^~

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Found 5 testcases.
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