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 1:3 Itai nyan~ Ninjin wa iyadanyan~ uhhh nyan~Sample Output 1:
nyan~Sample Input 2:
3 Itai! Ninjinnwaiyada T_T T_TSample Output 2:
nai
思路
求输入的几个字符串的最长公共后缀。
用一个cmstr暂时记录最长公共后缀，然后对于每一个输入的新字符串循环比较更新就行。
代码
#include<iostream>
using namespace std;
int main()
{
int N;
cin >> N;
string cmstr;
getchar();
for(int i = 0; i < N; i++)
{
string s;
getline(cin,s);
const int len = s.size();
for(int j = 0; j < len/2; j++)
{
swap(s[j],s[len - j - 1]);
}
if(i == 0)
{
cmstr = s;
continue;
}
else
{
int minlen = len > cmstr.size()?cmstr.size():len;
for(int v = 0; v < minlen; v++)
{
if(cmstr[v] != s[v])
{
cmstr = cmstr.substr(0,v);
break;
}
}
}
}
if(cmstr.size() == 0)
cout << "nai" <<endl;
else
{
for(int i = cmstr.size() - 1;i >= 0;i--)
{
cout << cmstr[i];
}
}
}