#include <cstdio> using namespace std; int main() { int n,x; scanf("%d", &n); int count1 = 0; for(int i=0;i<n;++i) { scanf("%d", &x); if(x==1) ++count1; } printf("%d\n2\n1 2", (count1>=2?0:2-count1)); return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | #include <cstdio> using namespace std; int main() { int n,x; scanf("%d", &n); int count1 = 0; for(int i=0;i<n;++i) { scanf("%d", &x); if(x==1) ++count1; } printf("%d\n2\n1 2", (count1>=2?0:2-count1)); return 0; } |