foo.cc: In function 'int main()':
foo.cc:5:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    5 |     scanf("%lld%lld",&n,&x);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:6:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 |     for(int i=1;i<=n;i++)scanf("%lld",&a[i]);
      |                          ~~~~~^~~~~~~~~~~~~~

Found 10 testcases.
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