mirror of
https://github.com/TheAlgorithms/Ruby
synced 2024-11-16 19:50:00 +01:00
31 lines
982 B
Ruby
31 lines
982 B
Ruby
def coin_change_minimum(coins, amount)
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dp = Array.new(amount + 1, -1)
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dp[0] = 0
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coins.each do |coin|
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(coin..amount).each do |i|
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if dp[i - coin] != -1
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dp[i] = -1 == dp[i] ? dp[i - coin] + 1 : [dp[i], dp[i - coin] + 1].min
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end
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end
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end
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dp[amount]
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end
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def coin_change_combinations(coins, amount)
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dp = Array.new(coins.length + 1) { Array.new(amount + 1, 0) }
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dp[0][0] = 1
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(1..coins.length).each do |i|
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(0..amount).each do |j|
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dp[i][j] = dp[i - 1][j] + (j < coins[i - 1] ? 0 : dp[i][j - coins[i - 1]])
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end
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end
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dp[coins.length][amount]
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end
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coins = Array[2, 4, 5]
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amount = 12
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puts 'Number of combinations of getting change for ' + amount.to_s + ' is ' + coin_change_combinations(coins,
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amount).to_s + '.'
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puts 'Minimum number of coins required for ' + amount.to_s + ' is ' + coin_change_minimum(coins, amount).to_s + '.'
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