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