用普通数组模拟的，输入八个数，就从a[8]-a[15]输入，然后比较a8,a9得出a4，a4a5->a2,依此类推的方法为什么只能过一个

#include <iostream>
using namespace std;

struct Country {
    int id; // 国家序号
    int score; // 国家成绩
};

int main() {
    int n;
    cin >> n;
    Country countries[n];
    for (int i = 0; i < n; i++) {
        cin >> countries[i].score;
        countries[i].id = i + 1;
    }

    while (n > 2) {
        for (int i = 0; i < n - 1; i += 2) {
            if (countries[i].score < countries[i + 1].score) {
                countries[i / 2].score = countries[i + 1].score;
                countries[i / 2].id = countries[i + 1].id;
            } else {
                countries[(i + 1) / 2].score = countries[i].score;
                countries[(i + 1) / 2].id = countries[i].id;
            }
        }
        n /= 2;
    }

    cout << countries[0].id << endl;
    return 0;
}