foo.cc: In function 'int main()':
foo.cc:9:110: warning: array subscript 5 is above array bounds of 'int [5]' [-Warray-bounds]
    9 |                 cout<<i<<' '<<a[i][0]<<' '<<a[i][1]<<' '<<a[i][2]<<' '<<a[i][3]<<' '<<a[i][4]<<' '<<a[i][5]<<'\n';
      |                                                                                                              ^~~~
foo.cc:3:5: note: while referencing 'a'
    3 | int a[55][5];
      |     ^

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