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September 2, 2019 21:49
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Coin changes
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| dfs (remainCoins, target): | |
| if target === 0: | |
| # calculate what coins you used here | |
| usedCoin = ... | |
| results.append(usedCoin) | |
| return | |
| if target < 0: | |
| return | |
| for coin in remainCoins: | |
| if remainCoins[coin] > 0: | |
| remainCoins[coin]-= 1 | |
| dfs(remainCoins, target - coin) | |
| remainCoins[coin]+= 1 |
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