def organizingContainers(container):
    ts=sorted([sum(t) for t in zip(*container)])
    cs=sorted([sum(c) for c in container])
    return "Possible" if ts == cs else "Impossible"

public static String organizingContainers(List<List<Integer>> containers) {
        int n = containers.size();
        int[] balls = new int[n];
        int[] capacity = new int[n];
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                balls[i] += containers.get(j).get(i);
                capacity[i] += containers.get(i).get(j);
            }
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            ans ^= balls[i];
            ans ^= capacity[i];
        }
        return ans == 0 ? "Possible" : "Impossible";
    }

def organizingContainers(container):
	return 'Possible' if sorted([sum(c) for c in list(map(list, zip(*container)))]) == sorted([sum(c) for c in container]) else 'Impossible'