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