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448.java
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448.java
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__________________________________________________________________________________________________
sample 4 ms submission
class Solution {
public List<Integer> findDisappearedNumbers(int[] nums) {
List<Integer> list = new ArrayList<>();
boolean[] b = new boolean[nums.length + 1];
for (int i = 0; i < nums.length ; i++) {
b[nums[i]] = true;
}
for (int i = 1; i < b.length; i++) {
if (!b[i]) {
list.add(i);
}
}
return list;
}
}
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sample 46084 kb submission
class Solution {
public List<Integer> findDisappearedNumbers(int[] nums) {
List<Integer> list = new ArrayList<>();
if(nums == null || nums.length == 0) {
return list;
}
int res = 0;
for(int i = 0; i < nums.length; i++) {
int index = Math.abs(nums[i]) - 1;
if(nums[index] > 0) {
nums[index] = -nums[index];
}
}
for(int i = 0; i < nums.length; i++) {
if(nums[i] > 0) {
list.add(i+1);
}
}
return list;
}
}
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