题解 | #打印极值点下标#

#include <cstdio>
#include <iostream>
using namespace std;

int main() {
    int k;
    int a[80];
    while (scanf("%d",&k) != EOF) {
        for (int i = 0; i < k; ++i) {
            scanf("%d",&a[i]);
        }
        for (int j = 0; j < k; ++j) {
            if(j == 0){
                if (a[j] != a[j+1]) {
                    printf("%d ",j);
                }
            }else if (j == k-1) {
                if (a[j] != a[j-1]) {
                    printf("%d ",j);
                }
            }else {
                if ((a[j] > a[j-1] && a[j] > a[j+1]) || (a[j] < a[j-1] && a[j] < a[j+1])) {
                    printf("%d ",j);
                }
            }
        }
        printf("\n");
    }
}