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36 lines
1.1 KiB
36 lines
1.1 KiB
// File: coin_change_greedy_test.go
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// Created Time: 2023-07-23
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// Author: Reanon (793584285@qq.com)
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package chapter_greedy
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import (
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"fmt"
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"testing"
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)
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func TestCoinChangeGreedy(t *testing.T) {
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// 貪婪：能夠保證找到全域性最優解
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coins := []int{1, 5, 10, 20, 50, 100}
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amt := 186
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res := coinChangeGreedy(coins, amt)
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fmt.Printf("coins = %v, amt = %d\n", coins, amt)
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fmt.Printf("湊到 %d 所需的最少硬幣數量為 %d\n", amt, res)
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// 貪婪：無法保證找到全域性最優解
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coins = []int{1, 20, 50}
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amt = 60
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res = coinChangeGreedy(coins, amt)
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fmt.Printf("coins = %v, amt = %d\n", coins, amt)
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fmt.Printf("湊到 %d 所需的最少硬幣數量為 %d\n", amt, res)
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fmt.Println("實際上需要的最少數量為 3 ，即 20 + 20 + 20")
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// 貪婪：無法保證找到全域性最優解
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coins = []int{1, 49, 50}
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amt = 98
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res = coinChangeGreedy(coins, amt)
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fmt.Printf("coins = %v, amt = %d\n", coins, amt)
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fmt.Printf("湊到 %d 所需的最少硬幣數量為 %d\n", amt, res)
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fmt.Println("實際上需要的最少數量為 2 ，即 49 + 49")
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}
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