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("%d",&n);
      |     ~~~~~^~~~~~~~~
foo.cc:8:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |                         scanf("%d",&p),a[j]=max(a[j],a[j+1])+p;
      |                         ~~~~~^~~~~~~~~

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