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- import java.util.HashMap;
- public class theUniqueNum {
- public int find(int[] nums) {
- HashMap<Integer, Integer> map = new HashMap<>();
- for(int i =0; i<nums.length;i++){
- int count = map.getOrDefault(nums[i], 0);
- count++;
- map.put(nums[i], count);
- }
- int i =0;
- for(; i<nums.length;i++){
- if(map.get(nums[i])==1){
- break;
- }
- }
- return i;
- }
- }
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