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d225b416cf
* add fractional_knapsack.c * update CMakeLists * add c code in chapter_greedy * fix header format * format code by clang-format * remove extra comments * replace ternary operator to MACRO * parameters form adjustment * Update fractional_knapsack.c * Update max_capacity.c * Update max_product_cutting.c * add comments for consistency with cpp ver * move MIN&MAX macro to source file * typo fix --------- Co-authored-by: Yudong Jin <krahets@163.com>
38 lines
869 B
C
38 lines
869 B
C
/**
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* File: max_product_cutting.c
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* Created Time: 2023-09-15
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* Author: xianii (xianyi.xia@outlook.com)
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*/
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#include "../utils/common.h"
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/* 最大切分乘积:贪心 */
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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 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 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 pow(3, a);
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}
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/* Driver Code */
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int main(void) {
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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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printf("最大切分乘积为 %d\n", res);
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return 0;
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}
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