void Solve(StreamScanner ss, StreamWriter sw)
{
//---------------------------------
N = ss.Next(int.Parse);
W = ss.Next(long.Parse);
G = ss.Next(long.Parse, 2, N)
.Select(a => new WeightValuePair(a[0], a[1]))
.GroupBy(wv => wv.Weight)
.OrderBy(g => g.Key)
.Select(g => g.OrderByDescending(wv => wv.Value).ToArray())
.ToArray();
sw.WriteLine(GetAns(0, 0, 0));
//---------------------------------
}
