#include <cstdio> using namespace std; int main() { int n; scanf("%d", &n); int cnt1 = 0; for (int i = 0; i < n; ++i) { int d; scanf("%d",&d); cnt1 += (d == 1); } if (cnt1 > 2) { cnt1 = 2; } printf("%d\n2\n1 2\n", 2 - cnt1); return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #include <cstdio> using namespace std; int main() { int n; scanf("%d", &n); int cnt1 = 0; for (int i = 0; i < n; ++i) { int d; scanf("%d",&d); cnt1 += (d == 1); } if (cnt1 > 2) { cnt1 = 2; } printf("%d\n2\n1 2\n", 2 - cnt1); return 0; } |