Leetcode | 14. Longest Common Prefix | Easy | Java Solution

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This video has the Problem Statement, Solution Walk-through, Code, for 14. Longest Common Prefix, with a Time Complexity of O(m.n) and Space Complexity of O(1)

Time Stamps ⏱️:
0:00 - Problem Statement
0:57 - Solving the Problem
2:19 - Code [Java]
4:08 - Time & Space Complexity
4:26 - IDE Debugging
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14. Longest Common Prefix
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class Solution {
public String longestCommonPrefix(String[] strs) {
String prefix=strs[0];
for(String s:strs){
while(!s.startsWith(prefix)){
prefix=prefix.substring(0, prefix.length()-1);
}
}

return prefix;
}
} Easiest Solution imo

arkapravochakrabarti

Arrays.sort(strs);
String one = strs[0];
String two = strs[strs.length - 1];
int idx = 0;
while (idx < one.length() && idx < two.length()) {
if (one.charAt(idx) == two.charAt(idx)) {
idx++;
} else break;
}
return one.substring(0, idx);

T.C is O(n)

pranawkaushal

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