53 lines
1.4 KiB
Java
53 lines
1.4 KiB
Java
/**
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*
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* @author Varun Upadhyay (https://github.com/varunu28)
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*
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*/
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public class CoinChange {
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// Driver Program
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public static void main(String[] args) {
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int amount = 12;
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int[] coins = {1, 2, 5};
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System.out.println("Number of combinations of getting change for " + amount + " is: " + change(coins, amount));
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}
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/**
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* This method finds the number of combinations of getting change for a given amount and change coins
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*
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* @param coins The list of coins
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* @param amount The amount for which we need to find the change
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* Finds the number of combinations of change
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**/
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public static int change(int[] coins, int amount) {
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int[] combinations = new int[amount+1];
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combinations[0] = 1;
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for (int coin : coins) {
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for (int i=coin; i<amount+1; i++) {
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if (i>=coin) {
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combinations[i] += combinations[i-coin];
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}
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}
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// Uncomment the below line to see the state of combinations for each coin
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// printAmount(combinations);
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}
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return combinations[amount];
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}
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// A basic print method which prints all the contents of the array
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public static void printAmount(int[] arr) {
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for (int i=0; i<arr.length; i++) {
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System.out.print(arr[i] + " ");
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}
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System.out.println();
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}
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}
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