PAT (Advanced Level) Practise 1077Kuchiguse (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
找一下最长公共后缀,直接暴力判断就好了。
#include<cstdio>#include<stack>#include<cstring>#include<string>#include<vector>#include<queue>#include<iostream>#include<algorithm>#include<functional>using namespace std;const int INF = 0x7FFFFFFF;const int maxn = 1e3 + 15;int n, len[maxn];char s[maxn][maxn];string ans;int main(){scanf("%d", &n);getchar();for (int i = 0; i < n; i++) gets(s[i]), len[i] = strlen(s[i]);for (int i = 1; i; i++){int flag = 1;for (int j = 1; j < n; j++){if (len[j] < i) { flag = 0; break; }if (s[j][len[j] - i] != s[j - 1][len[j - 1] - i]){flag = 0;break;}}if (flag) ans = s[0][len[0] - i] + ans; else break;}if (ans == "") ans = "nai";cout << ans << endl;return 0;}
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