PAT A1077. Kuchiguse (20/17)

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

  #include <cstdio>
  #include <algorithm>
  #include <cmath>
  #include <cstring>
  #define Max 300
  using namespace std;
  struct user
  {
  	char name[11];
  	char pas[11];
  }a[Max],b[Max];
  char getc(char a[],int m)
  {
  	return a[strlen(a)-1-m];
  }
  int main()
  {
  	char la[Max][Max];
  	int n,k=0,f=1;
  	scanf("%d",&n);
  	getchar();
  	for(int i=0;i<n;i++){
  		
  		gets(la[i]);
  	}
  	while (f==1){
  	for(int i=0;i<n-1;i++)
  	{
  		if(getc(la[i+1],k)!=getc(la[i],k)){
  			f=0;
  			break;
  		}
  	}
  	  if(f==1)  k++;
  	  else break;
  	}
  	if(k==0) printf("nai\n");
  	else {
  		for(int i=strlen(la[0])-k;i<strlen(la[0]);i++)
  			printf("%c",la[0][i]);
  	}
  	system("pause");
  	return 0;
  }