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39 lines
1 KiB
C#
39 lines
1 KiB
C#
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/**
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* File: max_product_cutting.cs
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* Created Time: 2023-07-21
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* Author: hpstory (hpstory1024@163.com)
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*/
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namespace hello_algo.chapter_greedy;
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public class max_product_cutting {
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/* 最大切分乘积:贪心 */
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public int maxProductCutting(int n) {
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// 当 n <= 3 时,必须切分出一个 1
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if (n <= 3) {
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return 1 * (n - 1);
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}
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// 贪心地切分出 3 ,a 为 3 的个数,b 为余数
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int a = n / 3;
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int b = n % 3;
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if (b == 1) {
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// 当余数为 1 时,将一对 1 * 3 转化为 2 * 2
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return (int)Math.Pow(3, a - 1) * 2 * 2;
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}
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if (b == 2) {
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// 当余数为 2 时,不做处理
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return (int)Math.Pow(3, a) * 2;
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}
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// 当余数为 0 时,不做处理
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return (int)Math.Pow(3, a);
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}
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[Test]
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public void Test() {
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int n = 58;
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// 贪心算法
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int res = maxProductCutting(n);
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Console.WriteLine("最大切分乘积为" + res);
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}
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}
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