백준 1547

백준 1547

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



int main()
{
	bool cups[3] = {1,0,0};
	bool temp;
	int changeN;
	cin >> changeN;
	for (int i = 0; i < changeN; i++)
	{
		int a, b;
		cin >> a >> b;
		temp = cups[a-1];
		cups[a-1] = cups[b-1];
		cups[b-1] = temp;
	}
	for (int i = 0; i < 3; i++)
		if (cups[i])
			cout << i+1;
}