foo.cc: In function 'int main()':
foo.cc:6:5: error: 'Cin' was not declared in this scope; did you mean 'sin'?
    6 |     Cin >> n >> k;
      |     ^~~
      |     sin
foo.cc:17:18: error: 'Endl' was not declared in this scope
   17 |     cout << m << Endl;
      |                  ^~~~

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