#include <bits/stdc++.h> int main () { int n, a, k=2; scanf ("%d",&n); while (n--) { scanf ("%d",&a); k-=(a==1); } printf ("%d\n2\n1 2\n",std::max(0,k)); return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | #include <bits/stdc++.h> int main () { int n, a, k=2; scanf ("%d",&n); while (n--) { scanf ("%d",&a); k-=(a==1); } printf ("%d\n2\n1 2\n",std::max(0,k)); return 0; } |