[转]PAT甲级练习1077. Kuchiguse (20)
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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:
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_TSample Output 2:
nai
题目大意:给定N给字符串,求他们的公共后缀,如果不存在公共后缀,就输出“nai”
分析:因为是后缀,反过来比较太麻烦,所以每输入一个字符串,就把它逆序过来再比较,就比较容易了。
首先ans = s;后来每输入的一个字符串,都和ans比较,如果后面不相同的就把它截取掉。
最后输出ans即可(要逆序输出~~)
#include <iostream>#include <cstdio>using namespace std;int main() { int n; scanf("%d", &n); string ans; getchar(); for(int i = 0; i < n; i++) { string s; getline(cin, s); int lens = s.length(); for(int j = 0; j < lens / 2; j++) { swap(s[j], s[lens-1-j]); } if(i == 0) { ans = s; continue; } else { int lenans = ans.length(); int minlen = lens < lenans ? lens : lenans; for(int j = 0; j < minlen; j++) { if(ans[j] != s[j]) { ans = ans.substr(0, j); break; } } } } if(ans.length() == 0) { printf("nai"); } else { for(int i = ans.length() - 1; i >= 0; i--) { printf("%c", ans[i]); } } return 0;}
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