foo.cc: In function 'int main()':
foo.cc:6:10: warning: unused variable 'k' [-Wunused-variable]
    6 |  int n,i,k,j,g;
      |          ^
foo.cc:9:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |   scanf("%d %lld",&g,&x);
      |   ~~~~~^~~~~~~~~~~~~~~~~
foo.cc:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |   scanf("%d",&s[j]);
      |   ~~~~~^~~~~~~~~~~~

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