#include <iostream> #include <string> #include <algorithm> #include <cstdio> using namespace std; const int N = 21; int n; int a[N]; void res (int n) { if (a[0] != a[1]) cout << 0 << " "; for (int i = 1; i < n - 1; i++) { if ((a[i] > a[i - 1] && a[i] > a[i + 1]) || (a[i] < a[i - 1] && a[i] < a[i + 1])) cout << i << " "; } if (a[n -1] != a[n - 2]) cout << n - 1 << " "; } int main() { while (cin >> n) { for (int i = 0; i < n; i++) cin >> a[i]; res(n); cout << endl; } return 0; } // 64 位输出请用 printf("%lld")