#include <iostream> using namespace std; int main() { int n, k, a; k = 0; cin >> n; for(int i=0; i<n; ++i) { cin >> a; if(a == 1) k++; } if(k == 0) cout << "2"; else if(k == 1) cout << "1"; else cout << "0"; cout << endl << "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 19 | #include <iostream> using namespace std; int main() { int n, k, a; k = 0; cin >> n; for(int i=0; i<n; ++i) { cin >> a; if(a == 1) k++; } if(k == 0) cout << "2"; else if(k == 1) cout << "1"; else cout << "0"; cout << endl << "2" << endl; cout << "1 2" << endl; return 0; } |