1077. Kuchiguse (20)

The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the speaker's personality. Such a preference is called "Kuchiguse" and is often exaggerated artistically in Anime and Manga. For example, the artificial sentence ending particle "nyan~" is often used as a stereotype for characters with a cat-like personality:

Itai nyan~ (It hurts, nyan~)

Ninjin wa iyada nyan~ (I hate carrots, nyan~)

Now given a few lines spoken by the same character, can you find her Kuchiguse?

Input Specification:

Each input file contains one test case. For each case, the first line is an integer N (2<=N<=100). Following are N file lines of 0~256 (inclusive) characters in length, each representing a character's spoken line. The spoken lines are case sensitive.

Output Specification:

For each test case, print in one line the kuchiguse of the character, i.e., the longest common suffix of all N lines. If there is no such suffix, write "nai".

Sample Input 1:

3Itai nyan~Ninjin wa iyadanyan~uhhh nyan~

Sample Output 1:

nyan~

Sample Input 2:

3Itai!Ninjinnwaiyada T_TT_T

Sample Output 2:

nai

分析：

（1）题意思就是从字符串最后开始比较，找出最长相同尾缀，然后不能以空格开头。

（2）注意边界条件，我的方法是先找出字符串总最短的size

#include <iostream>#include<vector>#include <string>using namespace std;int n;int main (){cin>>n;getchar();vector<string> ve(n);int i,minSize=300;for (i=0;i<n;i++){getline(cin,ve[i]);if (minSize>ve[i].size())minSize=ve[i].size();}vector <char> ans;int index=1;while (index<=minSize){int flag=0;for (i=0;i<n-1;i++){if (ve[i][ve[i].size()-index]==ve[i+1][ve[i+1].size()-index]){}else {flag=1;break;}}if (flag==0){ans.push_back(ve[i][ve[i].size()-index]);index++;}else break;}if (ans.size()==0) cout<<"nai";else {for (i=ans.size()-1;i>=0;i--){if (i==ans.size()-1&&ans[i]==' ') continue;cout<<ans[i];}}return 0;}