Score : $100$ points

Problem Statement

There are $N$ items, numbered $1, 2, \ldots, N$. For each $i$ ($1 \leq i \leq N$), Item $i$ has a weight of $w_i$ and a value of $v_i$.

Taro has decided to choose some of the $N$ items and carry them home in a knapsack. The capacity of the knapsack is $W$, which means that the sum of the weights of items taken must be at most $W$.

Find the maximum possible sum of the values of items that Taro takes home.

Constraints

• All values in input are integers.
• $1 \leq N \leq 100$
• $1 \leq W \leq 10^9$
• $1 \leq w_i \leq W$
• $1 \leq v_i \leq 10^3$

Input

Input is given from Standard Input in the following format:

$N$ $W$

$w_1$ $v_1$

$w_2$ $v_2$

$:$

$w_N$ $v_N$

Output

Print the maximum possible sum of the values of items that Taro takes home.

3 8
3 30
4 50
5 60

90

Items $1$ and $3$ should be taken. Then, the sum of the weights is $3 + 5 = 8$, and the sum of the values is $30 + 60 = 90$.

1 1000000000
1000000000 10

10

6 15
6 5
5 6
6 4
6 6
3 5
7 2

17

Items $2, 4$ and $5$ should be taken. Then, the sum of the weights is $5 + 6 + 3 = 14$, and the sum of the values is $6 + 6 + 5 = 17$.