#include <iostream> using namespace std; int main() { ios_base::sync_with_stdio(0); int n; cin >> n; int cnt1 = 0; for(int i=0; i<n; i++) { int a; cin >> a; if (a == 1) cnt1 += 1; } if (cnt1 >= 2) cout << "0" << endl; else if(cnt1 == 1) cout << "1" << endl; else cout << "2" << endl; cout << "2\n1 2" << endl; 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 | #include <iostream> using namespace std; int main() { ios_base::sync_with_stdio(0); int n; cin >> n; int cnt1 = 0; for(int i=0; i<n; i++) { int a; cin >> a; if (a == 1) cnt1 += 1; } if (cnt1 >= 2) cout << "0" << endl; else if(cnt1 == 1) cout << "1" << endl; else cout << "2" << endl; cout << "2\n1 2" << endl; return 0; } |