using namespace std; void abab(int n) { if(n<10){ cout<<n; return; } cout<<n%10; abab(n/10); } int main() { int a; cin>>a; abab(a); return 0; }
exit code: 0, checker exit code: 0
exit code: 0, checker exit code: 0
exit code: 0, checker exit code: 0
exit code: 0, checker exit code: 0