foo.cc: In function 'int main()':
foo.cc:7:10: warning: 'm' is used uninitialized in this function [-Wuninitialized]
    7 |  for(int i=m;i<=n;i++)
      |          ^
foo.cc:7:15: warning: 'n' is used uninitialized in this function [-Wuninitialized]
    7 |  for(int i=m;i<=n;i++)
      |              ~^~~

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