foo.cc: In function 'int main()':
foo.cc:5:10: error: 'n' was not declared in this scope; did you mean 'yn'?
    5 |     cin>>n>>m;
      |          ^
      |          yn
foo.cc:5:13: error: 'm' was not declared in this scope; did you mean 'tm'?
    5 |     cin>>n>>m;
      |             ^
      |             tm

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