foo.cc: In function 'int main()':
foo.cc:39:3: error: expected primary-expression before '}' token
   39 |   }
      |   ^
foo.cc:23:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |    scanf("%d",&a[i]);
      |    ~~~~~^~~~~~~~~~~~
foo.cc:30:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |    scanf("%d%d",&l,&r);
      |    ~~~~~^~~~~~~~~~~~~~

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