Method DSU

CPP/Kruskal's_Algorithm.cpp:12–21

public:
	DSU(int n)
	{
		parent = new int[n];
		rank = new int[n];

		for (int i = 0; i < n; i++) {
			parent[i] = -1;
			rank[i] = 1;
		}
	}

	// Find function
	int find(int i)