# 《算法竞赛入门经典2ndEdition》 例题3-4 猜数字游戏的提示(Master-Mind Hints, Uva340)

``#include <cstdio>#include <cstring>#include <algorithm>const int maxn = 1000;int num[maxn + 20], book[10], booknum[10], guess[maxn + 20], bookguess[10];using namespace std;int main(){  //freopen("New Text Document.txt","r",stdin);  //freopen("Output.txt","w",stdout);  int n, game = 0;  while(scanf("%d", &n) == 1 && n)  {    printf("Game %d:\n",++game);    memset(book, 0, sizeof(book));    for(int i = 1; i <= n; i++)    {      scanf("%d", &num[i]);      book[num[i]]++;    }    int x;    while(scanf("%d", &x) && x)    {      memset(bookguess, 0, sizeof(bookguess));      for(int i = 1; i<= 9; i++) booknum[i] = book[i];      int right = 0, appear = 0;      guess[1] = x;      bookguess[x]++;      if(guess[1] == num[1])       {        right++;        booknum[x]--;        bookguess[x]--;      }      for(int i = 2; i <= n; i++)      {        scanf("%d", &guess[i]);        bookguess[guess[i]]++;        if(guess[i] == num[i])         {          right++;          booknum[guess[i]]--;          bookguess[guess[i]]--;        }      }      for(int i = 1; i <= 9; i++)      {        if(bookguess[i] && booknum[i]) appear += min(bookguess[i], booknum[i]);      }      printf("    (%d,%d)\n",right,appear);    }    for(int i = 2; i <= n; i++)      scanf("%d", &x);  }  //getchar();getchar();  return 0;} ``

https://github.com/aoapc-book/aoapc-bac2nd/blob/master/ch3/UVa340.cpp

``// UVa340 Master-Mind Hints// Rujia Liu#include<stdio.h>#define maxn 1000 + 10int main() {  int n, a[maxn], b[maxn];  int kase = 0;  while(scanf("%d", &n) == 1 && n) { // n=0时输入结束    printf("Game %d:\n", ++kase);    for(int i = 0; i < n; i++) scanf("%d", &a[i]);    for(;;) {      int A = 0, B = 0;      for(int i = 0; i < n; i++) {        scanf("%d", &b[i]);        if(a[i] == b[i]) A++;      }      if(b[0] == 0) break; // 正常的猜测序列不会有0，所以只判断第一个数是否为0即可      for(int d = 1; d <= 9; d++) {        int c1 = 0, c2 = 0; // 统计数字d在答案序列和猜测序列中各出现多少次        for(int i = 0; i < n; i++) {          if(a[i] == d) c1++;          if(b[i] == d) c2++;        }        if(c1 < c2) B += c1; else B += c2;      }      printf("    (%d,%d)\n", A, B-A);    }  }  return 0;}``
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