题解 | #打印极值点下标#

#include <iostream>
using namespace std;

int main() {
    int n;
    while(cin>>n){
        int arr[n];
        for(int i =0;i<n;i++)
            cin>>arr[i];
        for(int i =0;i<n;i++){
            if(i==0){
                if(arr[0]!=arr[1])cout<<0<<" ";
            }else if(i==n-1){
                if(arr[i]!=arr[n-2])cout<<i<<" ";
            }else{
                if((arr[i]<arr[i+1]&& arr[i]<arr[i-1])||(arr[i]>arr[i+1]&& arr[i]>arr[i-1]))
                    cout<<i<<" ";
            }
        }cout<<endl;
    }
}
// 64 位输出请用 printf("%lld")