通过移除非空子串清空二进制字符串后,找到0最少的玩家
在本文中,我们将研究一个来自字符串操作和博弈论领域的有趣问题:“通过移除非空子串清空二进制字符串后,找到0最少的玩家”。这个问题探讨了使用二进制字符串在两个玩家之间进行竞争性游戏玩法的概念。我们的目标是确定在游戏结束时0最少的玩家。我们将讨论这个问题,提供代码实现,并用示例阐明概念。
理解问题陈述
给两个玩家一个二进制字符串,他们轮流玩游戏。在每一轮中,玩家移除一个包含至少一个'1'的非空子串。当字符串变空或字符串中没有'1'时,游戏结束。无法移动的玩家输掉游戏。任务是找到最终0最少的玩家。
方法
为了解决这个问题,我们需要计算由'0'分隔的至少包含一个'1'的段的个数。开始游戏的玩家总是会选择'1'最多的段。因此,第一个玩家总是可以确保他们移除的'1'比第二个玩家多,除非段的个数是偶数。在这种情况下,两个玩家都可以移除相同数量的'1'。
实现
示例
以下是实现上述策略的程序:
#include <stdio.h> #include <string.h> // Function to find the winner based on the string pattern int findWinner(char *s) { int segments = 0; // Count of consecutive '1' segments for (int i = 0; i < strlen(s);) { // Loop through the string if (s[i] == '1') { // If current character is '1' segments++; // Increment segment count while (i < strlen(s) && s[i] == '1') { i++; // Move to the next character while it's '1' } } i++; // Move to the next character } return segments % 2 == 0 ? 2 : 1; // If even segments, player 2 wins; else player 1 wins } int main() { char s[] = "100101"; int winner = findWinner(s); printf("Player %d wins\n", winner); return 0; }
输出
Player 1 wins
#include<bits/stdc++.h> using namespace std; int findWinner(string s) { int segments = 0; for (int i = 0; i < s.size();) { if (s[i] == '1') { segments++; while (i < s.size() && s[i] == '1') { i++; } } i++; } return segments % 2 == 0 ? 2 : 1; } int main() { string s = "100101"; int winner = findWinner(s); cout << "Player " << winner << " wins"; return 0; }
输出
Player 1 wins
public class Main { static int findWinner(String s) { int segments = 0; // Count of consecutive '1' segments for (int i = 0; i < s.length();) { // Loop through the string if (s.charAt(i) == '1') { // If current character is '1' segments++; // Increment segment count while (i < s.length() && s.charAt(i) == '1') { i++; // Move to the next character while it's '1' } } i++; // Move to the next character } return segments % 2 == 0 ? 2 : 1; // If even segments, player 2 wins; else player 1 wins } public static void main(String[] args) { String s = "100101"; int winner = findWinner(s); System.out.println("Player " + winner + " wins"); } }
输出
Player 1 wins
def findWinner(s): segments = 0 # Count of consecutive '1' segments i = 0 while i < len(s): # Loop through the string if s[i] == '1': # If current character is '1' segments += 1 # Increment segment count while i < len(s) and s[i] == '1': i += 1 # Move to the next character while it's '1' i += 1 # Move to the next character return 2 if segments % 2 == 0 else 1 # If even segments, player 2 wins; else player 1 wins def main(): s = "100101" winner = findWinner(s) print(f"Player {winner} wins") if __name__ == "__main__": main()
输出
Player 1 wins
这段代码迭代字符串,计算段的个数,然后检查段的个数是偶数还是奇数以决定获胜者。
测试用例
让我们考虑二进制字符串“100101”。此字符串中的段是“1”、“1”和“1”。由于段的个数是奇数,第一个玩家将赢得游戏,因为他们能够移除的'1'比第二个玩家多。
结论
在本文中,我们研究了通过移除非空子串清空二进制字符串后,找到0最少的玩家的问题。这个问题提出了字符串操作和博弈论的有趣交叉。我们探讨了这个问题,概述了解决方案的方法,提供了代码实现,并用示例详细阐述了该概念。
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