PAT A 1077. Kuchiguse (20)

题目

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

 

即求串尾的最长公用子串，暂存，从后面向前扫即可。

 

代码：

#include <iostream>#include <string>using namespace std;int main(){int n;cin>>n;cin.get();int i,j;string *sdata=new string [n];//存储所用字符串int min_size=256;//记录最小的字符串for(i=0;i<n;i++){getline(cin,sdata[i]);if(sdata[i].size()<min_size)min_size=sdata[i].size();}string common;char ctemp;for(i=0;i<min_size;i++)//从尾开始扫{ctemp=sdata[0][sdata[0].size()-i-1];for(j=1;j<n;j++){if(sdata[j][sdata[j].size()-i-1]!=ctemp)break;}if(j>=n)common+=ctemp;elsebreak;}if(common.size()==0)//输出cout<<"nai";else{for(i=common.size()-1;i>=0;i--)cout<<common[i];}delete [] sdata;return 0;}