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珠玑妙算游戏（the game of master mind）的玩法如下。
计算机有4个槽，每个槽放一个球，颜色可能是红色（R）、黄色（Y）、绿色（G）或蓝色（B）。例如，计算机可能有RGGB 4种（槽1为红色，槽2、3为绿色，槽4为蓝色）。作为用户，你试图猜出颜色组合。打个比方，你可能会猜YRGB。要是猜对某个槽的颜色，则算一次“猜中”；要是只猜对颜色但槽位猜错了，则算一次“伪猜中”。注意，“猜中”不能算入“伪猜中”。
给定一种颜色组合solution和一个猜测guess，编写一个方法，返回猜中和伪猜中的次数answer，其中answer[0]为猜中的次数，answer[1]为伪猜中的次数。
示例：
输入： solution="RGBY",guess="GGRR"输出： [1,1]解释： 猜中1次，伪猜中1次。
提示：
len(solution) = len(guess) = 4solution和guess仅包含"R","G","B","Y"这4种字符package Solutionmst1615;import java.util.Arrays;class Solution { public int[] masterMind(String solution, String guess) { int guessRcount = 0; int guessYcount = 0; int guessGcount = 0; int guessBcount = 0; int solutionRcount = 0; int solutionYcount = 0; int solutionGcount = 0; int solutionBcount = 0; for (int i = 0; i < guess.length(); i++) { if (guess.charAt(i) == 'R') { guessRcount++; } if (guess.charAt(i) == 'Y') { guessYcount++; } if (guess.charAt(i) == 'G') { guessGcount++; } if (guess.charAt(i) == 'B') { guessBcount++; } } for (int i = 0; i < solution.length(); i++) { if (solution.charAt(i) == 'R') { solutionRcount++; } if (solution.charAt(i) == 'Y') { solutionYcount++; } if (solution.charAt(i) == 'G') { solutionGcount++; } if (solution.charAt(i) == 'B') { solutionBcount++; } } int[] out = new int[2]; for (int i = 0; i < guess.length(); i++) { for (int j = 0; j < solution.length(); j++) { if (guess.charAt(i) == solution.charAt(j) && i == j) { if (solution.charAt(i) == 'R') { solutionRcount--; guessRcount--; } if (solution.charAt(i) == 'Y') { solutionYcount--; guessYcount--; } if (solution.charAt(i) == 'G') { solutionGcount--; guessGcount--; } if (solution.charAt(i) == 'B') { solutionBcount--; guessBcount--; } out[0]++; } } } if (guessRcount > 0 && solutionRcount > 0) { out[1] = out[1] + Math.min(guessRcount, solutionRcount); } if (guessYcount > 0 && solutionYcount > 0) { out[1] = out[1] + Math.min(guessYcount, solutionYcount); } if (guessGcount > 0 && solutionGcount > 0) { out[1] = out[1] + Math.min(guessGcount, solutionGcount); } if (guessBcount > 0 && solutionBcount > 0) { out[1] = out[1] + Math.min(guessBcount, solutionBcount); } return out; } public static void main(String[] args) { Solution sol = new Solution(); String solution = "YBBY", guess = "GYYB"; System.out.println(Arrays.toString(sol.masterMind(solution, guess))); }}
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