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EASY/src/easy/TwoSumIIIDataStructureDesign.java

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	`1`	`+packageeasy;`
	`2`	`+`
	`3`	`+importjava.util.HashSet;`
	`4`	`+importjava.util.Set;`
	`5`	`+`
	`6`	`+//Your TwoSum object will be instantiated and called as such:`
	`7`	`+//TwoSum twoSum = new TwoSum();`
	`8`	`+//twoSum.add(number);`
	`9`	`+//twoSum.find(value);`
	`10`	`+publicclassTwoSumIIIDataStructureDesign {`
	`11`	`+privateSet<Integer>set =newHashSet();`
	`12`	`+`
	`13`	`+// Add the number to an internal data structure.`
	`14`	`+publicvoidadd(intnumber) {`
	`15`	`+set.add(number);`
	`16`	`+ }`
	`17`	`+`
	`18`	`+// Find if there exists any pair of numbers which sum is equal to the value.`
	`19`	`+publicbooleanfind(intvalue) {`
	`20`	`+return`
	`21`	`+ }`
	`22`	`+}`

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