Leetcode Longest Common Prefix
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第一个字符串和第二个字符串比较得到最长公共前缀,再用得到的前缀跟下个字符串比较,得到最新的公共前缀,如此遍历下去,得到最后的最长公共前缀就是答案。
class Solution {public: string longestCommonPrefix(vector<string> &strs) { string ans, tmp; if(strs.empty()) return ans; ans = strs[0]; for(int i = 1; i < strs.size(); i++){ for(int j = 0; j < min(ans.size(), strs[i].size()); j++){ if(strs[i][j] == ans[j]) tmp += ans[j]; else break; } ans = tmp; tmp.clear(); } return ans; }};
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