你不一定会的宝宝级数学题
在新浪网发现一道数学题。。
思考半天,发现自己还不如宝宝。最后写了几行代码,计算机1秒内就算出结果。。科学啊
关系式:“红花映绿叶×春=叶绿映花红”
答题要求:请试用“0到9”的6个数字,分别代表“红,花,映,绿,叶以及春”这几个字,并且数字不能重复使用。使得关系式能够成立。
把下面代码Ctrl+C/V到VS2008,按下那个绿色小三角,即可看到答案~
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using System;
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namespace ConsoleApplication1
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{
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class Program
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{
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static void Main(string[] args)
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{
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for (int it = 12345; it < 54321; it++)
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{
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if (IsSame(it.ToString()))
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{
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for (int m = 2; m < 9; m++)
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{
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if (IsIn(it, m))
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{
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if (it.ToString().Equals(Reverse((it * m).ToString())))
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{
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Console.WriteLine(it);
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Console.WriteLine(m);
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}
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}
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}
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}
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}
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Console.ReadKey();
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}
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//
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static string Reverse(string original)
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{
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char[] arr = original.ToCharArray();
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Array.Reverse(arr);
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return new string(arr);
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}
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//test whether have the same number
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static bool IsSame(string aString)
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{
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char[] arr=aString.ToCharArray();
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for (int i = 0; i < aString.Length-2; i++)
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{
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if (arr[i] == arr[i + 1])
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return false;
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}
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return true;
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}
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//test whether in the int
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static bool IsIn(int aInt,int aM)
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{
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string theS = aInt.ToString();
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if(theS.IndexOf(aM.ToString())==-1)
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return true;
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else
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return false;
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}
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}
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}
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