LeetCode 14 - Longest Common Prefix
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Roman to Integer
Write a function to find the longest common prefix string amongst an array of strings.My Code
class Solution {public: string longestCommonPrefix(vector<string>& strs) { if (strs.empty()) return ""; else if (strs.size() == 1) return strs[0]; int minLen = strs[0].size(); for (int i = 0; i < strs.size() - 1; i++) { const string& str1 = strs[i]; const string& str2 = strs[i+1]; int curLen = 0; for (int j = 0; j < min(str1.size(), str2.size()); j++) if (str1[j] == str2[j]) curLen++; else break; minLen = min(minLen, curLen); } //cout << "minLen: " << minLen << endl; return strs[0].substr(0, minLen); }};Runtime: 8 ms
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