foo.cc: In function 'int main()':
foo.cc:16:7: error: 'i' was not declared in this scope
   16 |   for(i = 1; i<=n; i++)
      |       ^
foo.cc:29:6: error: 'i' was not declared in this scope
   29 |  for(i = 1; i<n; i++)
      |      ^
foo.cc:5:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    5 |  scanf("%d%d",&n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~

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