PAT_A1077#Kuchiguse

Source:

PAT A1077 Kuchiguse (20 分)

Description:

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). 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

Keys:

• 模拟题

Attention:

• s.insert(s.begin()+pos, str[i])，s.insert(pos, str)
• 使用getline(cin,str)，注意吃掉上一行的换行符

Code:

#include<cstdio>
#include<string>
#include<iostream>
using namespace std;

int main()
{
#ifdef ONLINE_JUDGE
#else
    freopen("Test.txt", "r", stdin);
#endif // ONLINE_JUDGE

    int n;
    string s,t;
    scanf("%d\n", &n);
    getline(cin,s);
    for(int i=1; i<n; i++)
    {
        getline(cin,t);
        string p;
        int ps=s.size()-1,pt=t.size()-1;
        while(ps>=0 && pt>=0 && s[ps]==t[pt])
        {
            p.insert(p.begin(),s[ps]);
            ps--;
            pt--;
        }
        s = p;
    }
    if(s.size())
        cout << s;
    else
        printf("nai");

    return 0;
}