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28 lines
566 B
28 lines
566 B
// File: coin_change_greedy.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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/* 零钱兑换：贪心 */
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func coinChangeGreedy(coins []int, amt int) int {
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// 假设 coins 列表有序
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i := len(coins) - 1
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count := 0
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// 循环进行贪心选择，直到无剩余金额
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for amt > 0 {
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// 找到小于且最接近剩余金额的硬币
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for i > 0 && coins[i] > amt {
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i--
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}
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// 选择 coins[i]
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amt -= coins[i]
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count++
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}
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// 若未找到可行方案，则返回 -1
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if amt != 0 {
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return -1
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}
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return count
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}
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