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Problem 1096. -- Weights and Measures ## Weights and Measures

Time Limit: 1 Sec Memory Limit: 256 MB

Submit: 19 Solved: 9

[Submit][Status][Discuss]## Description

A turtle named Mack, to avoid being cracked, has enlisted your advice as to the order in which turtles should be stacked to form Yertle the Turtle's throne. Each of the 5,607 turtles ordered by Yertle has a different weight and strength. Your task is to build the largest stack of turtles possible.

## Input

Standard input consists of several lines, each containing a pair of integers separated by one or more space characters, specifying the weight and strength of a turtle. The weight of the turtle is in grams. The strength, also in grams, is the turtle's overall carrying capacity, including its own weight. That is, a turtle weighing 300 g with a strength of 1,000 g can carry 700 g of turtles on its back. There are at most 5,607 turtles.

## Output

Your output is a single integer indicating the maximum number of turtles that can be stacked without exceeding the strength of any one.

## Sample Input

300 1000
1000 1200
200 600
100 101

## Sample Output

3

## HINT

## Source

UVA toolkit

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