foo.cc: In function 'int main()':
foo.cc:13:10: warning: 'pinjun' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |    pinjun+=list[i][j];
      |    ~~~~~~^~~~~~~~~~~~
foo.cc:12:7: warning: 'all' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |    all+=list[i][j];
      |    ~~~^~~~~~~~~~~~

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