1077 Kuchiguse （20 分）

1077 Kuchiguse （20 分）

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

求最长公共后缀

水不过我现在才知道在string s[] 数组内不能用length

代码

#include<bits/stdc++.h>
using namespace std;
int size(string s)
{
	int size = s.length();
	return size;
}
int main()
{
	int n;
	cin >> n;
	getchar();
	string s[105];
	int minn = 0x3f3f3f3f;
	for(int i = 1; i <= n ; i ++)
	{
		getline(cin, s[i]);
		reverse(s[i].begin(),s[i].end());
		minn = min(minn,size(s[i]));
	}	
	int flag = 0;
	int cnt = 0;
	for(int i = 0 ; i < minn && !flag; i++)
	{
		char ch = s[1].at(i);
		int ans = 1;
		for(int j = 2 ; j <= n && !flag; j++)
		{
			if(ch == s[j][i])
				ans++;
			else 
			{
				flag = 1;
				break;
			}
		}
		if(ans == n)
			cnt++;
	}
	if(!cnt)
		cout<<"nai"<<endl;
	else 
	{
		string gg = s[1].substr(0,cnt);
		reverse(gg.begin(),gg.end());
		cout<<gg<<endl;
	}
	return 0;
}