#include <bits/stdc++.h> #define forn(i, n) for(int i = 0; i < n; ++i) using namespace std; typedef long long LL; typedef pair<int, int> pint; int main() { ios_base::sync_with_stdio(false); cin.tie(0); int n, ones = 0; cin >> n; for (int i=0; i<n; i++) { int x; cin >> x; ones += (x == 1); } cout << max(0, 2-ones) << "\n"; cout << "2\n1 2"; return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | #include <bits/stdc++.h> #define forn(i, n) for(int i = 0; i < n; ++i) using namespace std; typedef long long LL; typedef pair<int, int> pint; int main() { ios_base::sync_with_stdio(false); cin.tie(0); int n, ones = 0; cin >> n; for (int i=0; i<n; i++) { int x; cin >> x; ones += (x == 1); } cout << max(0, 2-ones) << "\n"; cout << "2\n1 2"; return 0; } |