Array Partitioning

[devilsummer92]

I need to write a program which for a given array of integers determines whether or not it can be partitioned into two subarrays, each of which is in strictly increasing order.
When i run test cases my program passes 4/5 and I cant find the error for the last case. (I dont not know the values of the test case).

#include<iostream>
#include<string>
using namespace std;

bool run(){
	int numbers;
	int *arr;
	cin >> numbers;
	arr = new int[numbers];

	for (int i = 0; i < numbers; i++)
		cin >> arr[i];

	long long int MAX = 0;
	long long int MAX2 = 0;
	string stra = "";
	string strb = "";
	string result = "";
	string total = "";

	long long int sum = 0;

	for (int i = 0; i < numbers; i++){
		if (arr[i] >= MAX && arr[i] != arr[i - 1]){
			stra += to_string(arr[i]);
			MAX = arr[i];
		}

		else
			if (arr[i] >= MAX2 && MAX2 != MAX){
			strb += to_string(arr[i]);
			MAX2 = arr[i];
			}
	}

	for (int i = 0; i < numbers; i++){
		result = to_string(arr[i]);
		total += result;
	}

	long long int len1 = stra.length();
	long long int len2 = strb.length();

	sum += len1 + len2;

	delete[] arr;

	if (sum != total.length())
		return false;
	else
		return true;
}

int main()
{
	int test;
	cin >> test;

	while (test > 0)
	{
		if (run())
			cout << "Yes\n";
		else
			cout << "No\n";
		test--;
	}
	system("pause");
}