#include <bits/stdc++.h> using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); int n, a, c1 = 0; cin >> n; for (int i = 0; i < n; ++i) { cin >> a; if (a == 1) ++c1; } cout << max(2-c1, 0) << "\n2\n1 2\n"; return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | #include <bits/stdc++.h> using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); int n, a, c1 = 0; cin >> n; for (int i = 0; i < n; ++i) { cin >> a; if (a == 1) ++c1; } cout << max(2-c1, 0) << "\n2\n1 2\n"; return 0; } |