foo.cc: In function 'int main()':
foo.cc:25:5: warning: 'j' is used uninitialized in this function [-Wuninitialized]
   25 |    j+=a[i][k];
      |    ~^~~~~~~~~
foo.cc:34:5: warning: 'g' is used uninitialized in this function [-Wuninitialized]
   34 |    g+=a[i][k];
      |    ~^~~~~~~~~

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