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

     return ;
 }