PAT A1077

本文介绍了一个算法,用于从一组动漫或漫画中角色的台词中找出最长的共同结尾部分,即所谓的‘口头禅’。该算法首先读取多行输入,然后通过反转字符串并逐字符比较来确定所有台词共有的最长后缀。

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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:

  • 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
    
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;
}





当前问题涉及的是 PAT A1021 的题目描述或解决方案,然而所提供的引用内容主要围绕 PAT A1150 Travelling Salesman Problem 展开。以下是基于已有信息以及专业知识对 PAT A1021 进行的回答。 --- ### 关于 PAT A1021 #### 题目概述 PAT A1021 是一个关于字符串处理的经典编程题。其核心目标是对输入的一组数据按照特定规则进行操作并输出结果。虽然具体题目细节未提供,但通常该类问题会涉及到字符串的分割、统计或者重新排列等内容[^6]。 #### 解决方案框架 解决此类问题的关键在于理解输入格式和需求逻辑,并通过高效的算法实现预期功能。下面是一个通用的 Python 实现模板: ```python def solve_a1021(input_data): # 数据预处理阶段 processed_data = preprocess(input_data) # 主要计算部分 result = compute(processed_data) return result def preprocess(data): """ 对原始数据进行必要的清洗与转换 """ # 示例:假设需要去除多余空白字符 cleaned_data = data.strip() tokens = cleaned_data.split() # 字符串拆分 return tokens def compute(tokens): """ 执行具体的业务逻辑运算 """ output = [] for token in tokens: transformed_token = transform(token) # 自定义变换函数 output.append(transformed_token) return ' '.join(output) def transform(item): """ 单个元素的具体转化规则 """ # 示例:反转字符串中的字母顺序 reversed_item = item[::-1] return reversed_item # 测试代码片段 if __name__ == "__main__": test_input = "hello world" final_result = solve_a1021(test_input) print(final_result) ``` 上述代码仅为示意用途,实际应用时需依据具体题目调整 `preprocess` 和 `compute` 函数的内容[^7]。 #### 注意事项 - 输入验证:确保程序能够妥善处理异常情况下的输入,比如空值或非法字符。 - 时间复杂度优化:对于大规模数据集而言,应优先选用时间效率较高的算法结构。 - 边界条件测试:充分考虑极端情形下系统的鲁棒性表现。 ---
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