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14. Longest Common Prefix
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14. Longest Common Prefix
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/*
Write a function to find the longest common prefix string amongst an array of strings.
If there is no common prefix, return an empty string "".
Example 1:
Input: ["flower","flow","flight"]
Output: "fl"
Example 2:
Input: ["dog","racecar","car"]
Output: ""
Explanation: There is no common prefix among the input strings.
*/
public class Solution {
public string LongestCommonPrefix(string[] strs) {
if (strs.Length <= 0){
return "";
}
if (strs.Length == 1){
return strs[0];
}
if (strs[0].Length <= 0){
return "";
}
string s =strs[0];
int length = strs[0].Length;
Console.Write(length);
int count = 0;
string str = "";
while( length != count)
{
foreach (string k in strs)
{
if (k.Length <= count) {
count = length;
break;
}
if (s[count] == k[count]){
}
else {
count = length;
break;
}
Console.Write(s[count]);
}
if (count == length){
break;
}
str += s[count];
count++;
}
Console.Write(str);
return str;
}
}