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solves single number iii

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	`1`	`+// https://leetcode.com/problems/single-number-iii`
	`2`	`+// T: O(N)`
	`3`	`+// S: O(1)`
	`4`	`+`
	`5`	`+public class SingleNumberIII {`
	`6`	`+ public int[] singleNumber(int[] nums) {`
	`7`	`+ // get xor of 2 unique numbers a ^ b`
	`8`	`+ int diff = getXor(nums);`
	`9`	`+`
	`10`	`+ diff = getLastSetBit(diff);`
	`11`	`+`
	`12`	`+ final int[] result = {0, 0};`
	`13`	`+ for (int element : nums) {`
	`14`	`+ // different set bit`
	`15`	`+ if ((element & diff) == 0) {`
	`16`	`+ result[0] ^= element;`
	`17`	`+ } else result[1] ^= element;`
	`18`	`+ }`
	`19`	`+`
	`20`	`+ return result;`
	`21`	`+ }`
	`22`	`+`
	`23`	`+ private int getXor(int[] array) {`
	`24`	`+ int diff = 0;`
	`25`	`+ for (int element : array) {`
	`26`	`+ diff ^= element;`
	`27`	`+ }`
	`28`	`+ return diff;`
	`29`	`+ }`
	`30`	`+`
	`31`	`+ private int getLastSetBit(int x) {`
	`32`	`+ return x & -x;`
	`33`	`+ }`
	`34`	`+}`

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