Envío 1332

Código

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

int main(void)
{
	long size, lp = 0, rp = 0;
	cin >> size;

	vector<int> arr(size);

	for (long i = 0; i < size; i++)
		cin >> arr[i];

	for (long i = 0; i < size - 1; i++)
	{
		lp += arr[i];
		rp = 0;
		if (lp > 0)
		{
			for (long j = i + 1; j < size; j++)
				rp += arr[j];

			if (lp > 0 && rp < 0)
			{
				cout << i + 1 << endl;
				return (0);
			}
		}
	}

	cout << "Impossible" << endl;
	return (0);
}