1045怎么做错了？？？？？？？？？？？？？？？

int a[1000000], n, zdz = 0, zdzwz = 0, zxz = 0, zxzwz = 0;

cin >> n;

for (int i = 1; i <= n; i++) {

    cin >> a[i];

    if (zdz < a[i]) {

        zdz = a[i];

        zdzwz = i;
    }
    if (zxz > a[i]) {

        zxz = a[i];

        zxzwz = i;
    }

}

cout << zxz << " " << zxzwz << " " << zdz << " " << zdzwz;

return 0;