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添加 0034.在排序数组中查找元素的第一个和最后一个位置.md C语言解法
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@ -739,6 +739,60 @@ class Solution {
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}
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```
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### C
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```c
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int searchLeftBorder(int *nums, int numsSize, int target) {
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int left = 0, right = numsSize - 1;
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// 记录leftBorder没有被赋值的情况
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int leftBorder = -1;
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// 边界为[left, right]
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while (left <= right) {
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// 更新middle值,等同于middle = (left + right) / 2
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int middle = left + ((right - left) >> 1);
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// 若当前middle所指为target,将左边界设为middle,并向左继续寻找左边界
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if (nums[middle] == target) {
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leftBorder = middle;
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right = middle - 1;
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} else if (nums[middle] > target) {
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right = middle - 1;
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} else {
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left = middle + 1;
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}
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}
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return leftBorder;
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}
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int searchRightBorder(int *nums, int numsSize, int target) {
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int left = 0, right = numsSize - 1;
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// 记录rightBorder没有被赋值的情况
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int rightBorder = -1;
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while (left <= right) {
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int middle = left + ((right - left) >> 1);
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// 若当前middle所指为target,将右边界设为middle,并向右继续寻找右边界
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if (nums[middle] == target) {
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rightBorder = middle;
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left = middle + 1;
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} else if (nums[middle] > target) {
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right = middle - 1;
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} else {
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left = middle + 1;
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}
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}
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return rightBorder;
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}
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int* searchRange(int* nums, int numsSize, int target, int* returnSize){
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int leftBorder = searchLeftBorder(nums, numsSize, target);
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int rightBorder = searchRightBorder(nums, numsSize, target);
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// 定义返回数组及数组大小
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*returnSize = 2;
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int *resNums = (int*)malloc(sizeof(int) * 2);
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resNums[0] = leftBorder;
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resNums[1] = rightBorder;
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return resNums;
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}
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```
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<p align="center">
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<a href="https://programmercarl.com/other/kstar.html" target="_blank">
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<img src="../pics/网站星球宣传海报.jpg" width="1000"/>
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