cpp-algo-cases/chapter_greedy/max_product_cutting.cpp

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/**
* File: max_product_cutting.cpp
* Created Time: 2023-07-21
* Author: krahets (krahets@163.com)
*/
#include "../utils/common.hpp"
/* 最大切分乘积:贪心 */
int maxProductCutting(int n) {
// 当 n <= 3 时,必须切分出一个 1
if (n <= 3) {
return 1 * (n - 1);
}
// 贪心地切分出 3 a 为 3 的个数b 为余数
int a = n / 3;
int b = n % 3;
if (b == 1) {
// 当余数为 1 时,将一对 1 * 3 转化为 2 * 2
return (int)pow(3, a - 1) * 2 * 2;
}
if (b == 2) {
// 当余数为 2 时,不做处理
return (int)pow(3, a) * 2;
}
// 当余数为 0 时,不做处理
return (int)pow(3, a);
}
/* Driver Code */
int main() {
int n = 58;
// 贪心算法
int res = maxProductCutting(n);
cout << "最大切分乘积为" << res << endl;
return 0;
}