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/*
* File: coin_change_greedy.rs
* Created Time: 2023-07-22
* Author: night-cruise (2586447362@qq.com)
*/
/* 最大切分乘积：贪心 */
fn max_product_cutting ( n : i32 ) -> i32 {
// 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 ， ，
let a = n / 3 ;
let b = n % 3 ;
if b = = 1 {
// 当余数为 1 时，将一对 1 * 3 转化为 2 * 2
3_ i32 . pow ( a as u32 - 1 ) * 2 * 2
} else if b = = 2 {
// 当余数为 2 时，不做处理
3_ i32 . pow ( a as u32 ) * 2
} else {
// 当余数为 0 时，不做处理
3_ i32 . pow ( a as u32 )
}
}
/* Driver Code */
fn main ( ) {
let n = 58 ;
// 贪心算法
let res = max_product_cutting ( n ) ;
println! ( "最大切分乘积为 {}" , res ) ;
}
