foo.cc: In function ‘int main()’:
foo.cc:9:8: warning: array subscript 3 is above array bounds of ‘long long int [3]’ [-Warray-bounds=]
    9 |     a[3]=n%10;
      |     ~~~^
foo.cc:3:13: note: while referencing ‘a’
    3 | long long n,a[3];
      |             ^
foo.cc:10:16: warning: array subscript 4 is outside array bounds of ‘long long int [3]’ [-Warray-bounds=]
   10 |     stable_sort(a+1,a+4);
      |     ~~~~~~~~~~~^~~~~~~~~
foo.cc:3:13: note: at offset 32 into object ‘a’ of size 24
    3 | long long n,a[3];
      |             ^
foo.cc:10:16: warning: array subscript 4 is outside array bounds of ‘long long int [3]’ [-Warray-bounds=]
   10 |     stable_sort(a+1,a+4);
      |     ~~~~~~~~~~~^~~~~~~~~
foo.cc:3:13: note: at offset 32 into object ‘a’ of size 24
    3 | long long n,a[3];
      |             ^
foo.cc:10:16: warning: array subscript 4 is outside array bounds of ‘long long int [3]’ [-Warray-bounds=]
   10 |     stable_sort(a+1,a+4);
      |     ~~~~~~~~~~~^~~~~~~~~
foo.cc:3:13: note: at offset 32 into object ‘a’ of size 24
    3 | long long n,a[3];
      |             ^
foo.cc:11:14: warning: array subscript 3 is above array bounds of ‘long long int [3]’ [-Warray-bounds=]
   11 |     cout<<a[3]<<a[2]<<a[1];
      |              ^
foo.cc:3:13: note: while referencing ‘a’
    3 | long long n,a[3];
      |             ^