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添加0018.四数之和 Java版本
添加0018.四数之和 Java版本
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@ -121,7 +121,48 @@ public:
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Java:
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```Java
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class Solution {
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public List<List<Integer>> fourSum(int[] nums, int target) {
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List<List<Integer>> result = new ArrayList<>();
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Arrays.sort(nums);
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for (int i = 0; i < nums.length; i++) {
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if (i > 0 && nums[i - 1] == nums[i]) {
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continue;
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}
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for (int j = i + 1; j < nums.length; j++) {
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if (j > i + 1 && nums[j - 1] == nums[j]) {
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continue;
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}
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int left = j + 1;
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int right = nums.length - 1;
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while (right > left) {
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int sum = nums[i] + nums[j] + nums[left] + nums[right];
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if (sum > target) {
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right--;
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} else if (sum < target) {
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left++;
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} else {
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result.add(Arrays.asList(nums[i], nums[j], nums[left], nums[right]));
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while (right > left && nums[right] == nums[right - 1]) right--;
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while (right > left && nums[left] == nums[left + 1]) left++;
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left++;
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right--;
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}
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}
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}
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}
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return result;
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}
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}
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```
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Python:
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