写P5728的时候，想用vector二维数组，但是报错RE，不知道为啥捏。已用普通数组过了，但是好好奇啊。

#include<iostream>
#include<set>
#include<vector>
#include<iomanip>

using namespace std;

int main()
{
	int n = 0;
	cin >> n;
	vector<int> nums [4];
	int counter = 0;
	for (int i = 1; i <= n; i++)
	{
		int a ,b,c= 0;
		cin >> a;
		nums[i].push_back(a);
		cin >> b;
		nums[i].push_back(b);
		cin >> c;
		nums[i].push_back(c);
		int sum = a + b + c;
		nums[i].push_back(sum);
	}	
	for (int i = 1; i <= n; i++)
	{
		for (int j = i + 1; j <= n; j++)
		{
			if ((abs(nums[i][0] - nums[j][0]) <= 5) &&
				(abs(nums[i][1] - nums[j][1]) <= 5) &&
				(abs(nums[i][2] - nums[j][2]) <= 5) &&
				(abs(nums[i][3] - nums[j][3]) <= 10))
			{
				counter++;
			}
		}
	}
	cout << counter ;
}