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136.java
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136.java
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sample 0 ms submission
class Solution {
public int singleNumber(int[] nums) {
int x = 0;
for (int a : nums) {
x = x ^ a;
}
return x;
}
}
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sample 35152 kb submission
class Solution {
public int singleNumber(int[] nums) {
HashMap<Integer, Integer> map = new HashMap<>();
for(int i:nums){
if(!map.containsKey(i)){
map.put(i,1);
}
else{
map.replace(i, map.get(i)+1);
}
}
int result = 0;
for(int j:nums){
if(map.get(j) == 1) result = j;
}
return result;
}
}
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