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/**
* File: max_product_cutting.c
* Created Time: 2023-09-15
* Author: xianii (xianyi.xia@outlook.com)
*/
# include "../utils/common.h"
/* 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 pow ( 3 , a - 1 ) * 2 * 2 ;
}
if ( b = = 2 ) {
// 当余数为 2 时,不做处理
return pow ( 3 , a ) * 2 ;
}
// 当余数为 0 时,不做处理
return pow ( 3 , a ) ;
}
/* Driver Code */
int main ( void ) {
int n = 58 ;
// 贪心算法
int res = maxProductCutting ( n ) ;
printf ( " 最大切分乘积为 %d \n " , res ) ;
return 0 ;
}