foo.cc: In function 'void ins(long long int&, long long int, long long int, long long int, long long int)':
foo.cc:40:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   40 |         int mid=l+r>>1;
      |                 ~^~
foo.cc: In function 'long long int merge(long long int, long long int, long long int, long long int)':
foo.cc:53:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   53 |         int mid=l+r>>1;
      |                 ~^~
foo.cc: In function 'node qry(long long int, long long int, long long int, long long int)':
foo.cc:65:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |         int mid=l+r>>1;
      |                 ~^~

Found 20 testcases.
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