38 lines
686 B
C++
38 lines
686 B
C++
#include "s0704_binary_search.hpp"
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// 闭区间写法
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int Solution1::binSearch(vector<int>& nums, int target) {
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int len = nums.size();
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int l{0};
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int r = len - 1;
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while (l <= r) {
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int m = (l + r) >> 1;
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if (target < nums[m]) {
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r = m - 1;
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} else if (nums[m] < target) {
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l = m + 1;
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} else {
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return m;
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}
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}
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return -1;
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}
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// 开区间写法
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int Solution2::binSearch(vector<int>& nums, int target) {
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int len = nums.size();
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int l{0};
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int r = len;
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while (l < r) {
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int m = (l + r) >> 1;
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if (target < nums[m]) {
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r = m;
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} else if (nums[m] < target) {
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l = m + 1;
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} else {
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return m;
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}
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}
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return -1;
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}
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