1077. Kuchiguse (20)

​ 时间限制

​ 100 ms

​ 内存限制

​ 65536 kB

​ 代码长度限制

​ 16000 B

​ 判题程序

​ Standard

​ 作者

​ HOU, Qiming

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:

3
Itai nyan~
Ninjin wa iyadanyan~
uhhh nyan~

Sample Output 1:

nyan~

Sample Input 2:

3
Itai!
Ninjinnwaiyada T_T
T_T

Sample Output 2:

nai

后缀相同的输出，无则输出nai

代码如下：

#include<iostream>
#include<string>

using namespace std;


int main(){
	int n;
	scanf("%d",&n);
	getchar();
	string s;
	string ans;
	for(int i=0;i<n;++i){
		getline(cin,s);
		if(i==0){
			ans=s;
		}else{
			int index=ans.size();
			if(index==0){
				printf("nai");
				return 0;
			}
			
			for(int j=s.size()-1;j>=0;--j){
				if(index<=0)break;
				
				if(ans[--index]!=s[j]){
					ans=s.substr(j+1,s.size()-j);
					break;
				}
			}
			
		}
	}
	if(ans.size()==0){
		printf("nai");
	}else{
		cout<<ans;
	}
	return 0;
}