#include<bits/stdc++.h>
using namespace std;
struct node {
	int num;
	int id;
};
list<node>a;
list<node>::iterator it = a.begin();
inline list<node>::iterator operator+(list<node>::iterator z, int x) {
	list<node>::iterator i = z;
	for (; x--; ++i);
	return i;
}
inline bool operator ==(node a, node b) {
	return a.num == b.num;
}
inline ostream& operator<<(ostream& out, node a) {
	printf("%d", a.id);
	return out;
}
int main() {
	long long n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		int x;
		cin >> x;
		a.push_back(node{x, i});
	}
	while (!a.empty()) 
	{
		it = a.begin();
		for (it = a.begin(); it != a.end();it++) 
		{
			if (!(*it == *(it + 1))) 
			{
				cout << *it << " ";
				a.erase(it);
				continue;			
			} 
			cout << *it << " ";
			it=a.erase(it);
			if (!(*it == *(it + 1))) 
			{
				
			} 
			else 
			{
				while (((it + 1) != a.end() && it != a.end()) && *it == *(it + 1)) 
				{
					it++;
				}
			}
		}
		cout << endl;
	}

}

本地两个样例可以正常运行，我下载的第一个测试点的数据也可以正常运行，为啥洛谷上RE？