PAT A1077

1077. Kuchiguse (20)

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:

3Itai nyan~Ninjin wa iyadanyan~uhhh nyan~

Sample Output 1:

nyan~

Sample Input 2:

3Itai!Ninjinnwaiyada T_TT_T

Sample Output 2:

nai

实现代码如下：

#include <iostream>#include <cstdio>#include <cstring>using namespace std;char s[105][266];void reverse(char * a){    char ch;    for(int i = 0, j = strlen(a) - 1; i < j; i++, j--){        ch = a[i];        a[i] = a[j];        a[j] = ch;    }}int main(){    int N, min_len = 266;    cin>>N;    getchar();    for(int i = 0; i < N; i++){        gets(s[i]);        min_len > strlen(s[i]) ? min_len = strlen(s[i]) : min_len = min_len;        reverse(s[i]);    }    char ch; bool k; int jl = 0;    for(int i = 0; i < min_len; i++){        k = true;        ch = s[0][i];        for(int j = 1; j < N; j++){            if(ch != s[j][i]){                k = false;                break;            }        }        if(k) jl++;        else break;    }    if(jl){        for(int i = jl - 1; i >= 0; i--){            cout<<s[0][i];        }    }else{        cout<<"nai"<<endl;    }    return 0;}