using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static void Main(string[] args)
    {
        new Program().Calc();
    }

    Scanner cin;

    public Program() { }

    void Calc()
    {
        cin = new Scanner();

        int n = cin.nextInt();
        int w = cin.nextInt();

        int[] weight = new int[n + 1];
        int[] value = new int[n + 1];

        for (int i = 1; i <= n; ++i)
        {
            weight[i] = cin.nextInt();
            value[i] = cin.nextInt();
        }

        const int maxTotalValue = 100000;
        int[,] dp = new int[n + 1, maxTotalValue + 1];

        for (int totalValue = 1; totalValue <= maxTotalValue; ++totalValue)
        {
            dp[0, totalValue] = int.MaxValue;
        }

        int maxValue = 0;

        for (int index = 1; index <= n; ++index)
        {
            for (int totalValue = 1; totalValue <= maxTotalValue; ++totalValue)
            {
                dp[index, totalValue] = int.MaxValue;


                int totalWeight = int.MaxValue;
                if (totalValue >= value[index])
                {
                    int dp_ = dp[index - 1, totalValue - value[index]];
                    if (dp_ != int.MaxValue)
                    {
                        int weight_ = dp_ + weight[index];
                        if (weight_ <= w)
                        {
                            totalWeight = weight_;

                            if (maxValue < totalValue)
                            {
                                maxValue = totalValue;
                            }
                        }
                    }
                }

                int lastWeight = dp[index - 1, totalValue];
                totalWeight = Math.Min(totalWeight, lastWeight);

                dp[index, totalValue] = totalWeight;
            }
        }

        Console.WriteLine(maxValue);
    }
}

class Scanner
{
    string[] s;
    int i;

    char[] cs = new char[] { ' ' };

    public Scanner()
    {
        s = new string[0];
        i = 0;
    }

    public string next()
    {
        if (i < s.Length) return s[i++];
        string st = Console.ReadLine();
        while (st == "") st = Console.ReadLine();
        s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
        if (s.Length == 0) return next();
        i = 0;
        return s[i++];
    }

    public int nextInt()
    {
        return int.Parse(next());
    }
    public int[] ArrayInt(int N, int add = 0)
    {
        int[] Array = new int[N];
        for (int i = 0; i < N; i++)
        {
            Array[i] = nextInt() + add;
        }
        return Array;
    }

    public long nextLong()
    {
        return long.Parse(next());
    }

    public long[] ArrayLong(int N, long add = 0)
    {
        long[] Array = new long[N];
        for (int i = 0; i < N; i++)
        {
            Array[i] = nextLong() + add;
        }
        return Array;
    }

    public double nextDouble()
    {
        return double.Parse(next());
    }


    public double[] ArrayDouble(int N, double add = 0)
    {
        double[] Array = new double[N];
        for (int i = 0; i < N; i++)
        {
            Array[i] = nextDouble() + add;
        }
        return Array;
    }
}


Measured memory_bytes: 50400