foo.cc: In function 'int main()':
foo.cc:18:16: warning: 'm' is used uninitialized in this function [-Wuninitialized]
  int com[n+1][m+1];
               ~^~
foo.cc:18:11: warning: 'n' is used uninitialized in this function [-Wuninitialized]
  int com[n+1][m+1];
          ~^~

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