p350

LeetCode 350 Intersection of Two Arrays II 题解

1.题目:

Given two arrays, write a function to compute their intersection.

Example:
Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2].

题意:

返回两个数组的公共部分

2.解题思路:

感觉有点暴力

3.代码


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public class Solution {
public int[] intersect(int[] nums1, int[] nums2) {
Arrays.sort(nums1);
Arrays.sort(nums2);
ArrayList<Integer> ansArrayList = new ArrayList<Integer>();
int len1 = nums1.length;
int len2 = nums2.length;
int i = 0;
int j = 0;
for (; i < len1 && j < len2;) {
if (nums1[i] == nums2[j]) {
ansArrayList.add(nums1[i]);
i++;
j++;

} else if (nums1[i] > nums2[j]) {
j++;
} else {
i++;
}
}
int[] ans = new int[ansArrayList.size()];
for (int k = 0; k < ansArrayList.size(); k++) {
ans[k] = ansArrayList.get(k);
}
return ans;

}
}


4.一些总结: