From 2a23f32bd6db02252509d0d9fdddc0b44b10056a Mon Sep 17 00:00:00 2001
From: Haidong Ji
Date: Sun, 2 Sep 2018 16:07:59 -0500
Subject: Changing Money Greedy Algo done.

---
 .../sources/ChangingMoney.java                     | 26 ++++++++++++++++++++++
 .../tests/ChangingMoneyTest.java                   | 25 +++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 AlgoDesignAndTechniqueEdxJava/sources/ChangingMoney.java
 create mode 100644 AlgoDesignAndTechniqueEdxJava/tests/ChangingMoneyTest.java

(limited to 'AlgoDesignAndTechniqueEdxJava')

diff --git a/AlgoDesignAndTechniqueEdxJava/sources/ChangingMoney.java b/AlgoDesignAndTechniqueEdxJava/sources/ChangingMoney.java
new file mode 100644
index 0000000..08efc17
--- /dev/null
+++ b/AlgoDesignAndTechniqueEdxJava/sources/ChangingMoney.java
@@ -0,0 +1,26 @@
+import java.util.Scanner;
+
+public class ChangingMoney {
+
+	public static int getNumOfCoins(int m) {
+		// coins with denominations of 1, 5, and 10
+		int coinCount = 0;
+		int remainder;
+		if (m / 10 == 0 && m % 10 == 0)
+			return m / 10;
+		coinCount = coinCount + m / 10;
+		remainder = m % 10;
+		if (remainder >= 5)
+			return coinCount + 1 + remainder - 5;
+		else
+			return coinCount + remainder;
+	}
+
+	public static void main(String args[]) {
+		Scanner in = new Scanner(System.in);
+		int m = in.nextInt();
+
+		System.out.println(getNumOfCoins(m));
+	}
+
+}
diff --git a/AlgoDesignAndTechniqueEdxJava/tests/ChangingMoneyTest.java b/AlgoDesignAndTechniqueEdxJava/tests/ChangingMoneyTest.java
new file mode 100644
index 0000000..a6cb487
--- /dev/null
+++ b/AlgoDesignAndTechniqueEdxJava/tests/ChangingMoneyTest.java
@@ -0,0 +1,25 @@
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
+
+public class ChangingMoneyTest {
+	@Test
+	void testChangingMoney1() {
+		assertEquals(1, ChangingMoney.getNumOfCoins(1));
+	}
+	@Test
+	void testChangingMoney2() {
+		assertEquals(2, ChangingMoney.getNumOfCoins(2));
+	}
+	@Test
+	void testChangingMoney6() {
+		assertEquals(2, ChangingMoney.getNumOfCoins(6));
+	}
+	@Test
+	void testChangingMoney28() {
+		assertEquals(6, ChangingMoney.getNumOfCoins(28));
+	}
+	@Test
+	void testChangingMoney1000() {
+		assertEquals(100, ChangingMoney.getNumOfCoins(1000));
+	}
+}
-- 
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