PAT (Advanced Level) Practice 1077 Kuchiguse (20分) （string反转）

1.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:

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

2.题目分析

因为长度不一样，所以反转后进行比较

3.代码

#include<iostream>
#include<string>
#include<cstring>
#include<algorithm>
using namespace std;
int main()
{
	int n;
	scanf("%d", &n);
	string temp;
	string out = "";
	getchar();
	getline(cin, temp);
	out = temp;
	reverse(out.begin(), out.end());

	for (int i = 1; i < n; i++)
	{
		getline(cin, temp);
		reverse(temp.begin(), temp.end());
		int l = min(out.length(), temp.length());
		int j;
		for (int j = 0; j < l; j++)
		{
			if (out[j] != temp[j]) { out = out.substr(0, j); break; }
		}
	}
	reverse(out.begin(), out.end());
	if (out.length()>0)
		cout << out;
	else cout << "nai";
}