题解 | #打印极值点下标#

#include <bits/stdc++.h>

using namespace std;
const int N = 100;
int a[N];
 
int main(){
	
	int k;
	
	while (cin >> k){
		for (int i=0; i<k; i++){
			cin >> a[i];
		}
		for (int i=0; i<k; i++){
			if (i == 0 && a[i] != a[i+1]){
				printf("%d ", i);
				continue;
			}
			else if (i == k-1 && a[i-1] != a[i]){
				printf("%d", i);
			}
			else{
				if ((a[i] < a[i-1] && a[i] < a[i+1]) || (a[i] > a[i-1]) && a[i] > a[i+1]){
					printf("%d ", i);
				}
			}
		}
		printf("\n");
	}
	return 0;
}