27 lines
549 B
Java
27 lines
549 B
Java
/*
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* @lc app=leetcode id=278 lang=java
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*
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* [278] First Bad Version
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*/
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// @lc code=start
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/* The isBadVersion API is defined in the parent class VersionControl.
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boolean isBadVersion(int version); */
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public class Solution extends VersionControl {
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public int firstBadVersion(int n) {
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int l = 1, r = n, m;
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while(l < r) {
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m = l + (r-l)/2;
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if(isBadVersion(m)) {
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r = m;
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} else {
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l = m + 1;
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}
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}
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return l;
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}
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}
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// @lc code=end
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