foo.cc: In function 'int main()':
foo.cc:27:49: warning: 'maxn' may be used uninitialized [-Wmaybe-uninitialized]
   27 |         cout << "m=" << maxm << endl << "n=" << maxn;
      |                                                 ^~~~
foo.cc:16:13: note: 'maxn' was declared here
   16 |         int maxn;
      |             ^~~~
foo.cc:27:25: warning: 'maxm' may be used uninitialized [-Wmaybe-uninitialized]
   27 |         cout << "m=" << maxm << endl << "n=" << maxn;
      |                         ^~~~
foo.cc:15:13: note: 'maxm' was declared here
   15 |         int maxm;
      |             ^~~~

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