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#include <iostream>

using namespace std;

int main()
{
	int n, L = 1;
	cin >> n;
	long long *a = new long long[n], *r = new long long[n];
	
	for (int i=0;i<n;++i)
	{
		cin >> a[i] >> r[i];
	}	
	cout << 2137 << endl;
	delete[] a;
	delete[] r;
	return 0;
}