题解 | #打印极值点下标#

#include<cstdio>

int main(){
    int n;
    int arr[100];
    while(scanf("%d",&n) != EOF){
        for(int i = 0 ; i < n ; ++ i){
            scanf("%d",&arr[i]);
        }
        if(arr[0] != arr[1]){
            printf("%d ",0);
        }
       
            for(int i = 1; i < n-1 ; ++ i){
                if(arr[i]> arr[i+1] && arr[i]> arr[i-1]
                || arr[i]< arr[i+1] && arr[i]< arr[i-1]){
                    printf("%d ",i);
                }
            }
            if(arr[n] != arr[n-1]){
            printf("%d",n-1);
        }
       
    }

}