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Commit 52642b0

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add a solution for 860
1 parent a9bde29 commit 52642b0

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2 files changed

+68
-35
lines changed
  • src
    • main/java/com/fishercoder/solutions/firstthousand
    • test/java/com/fishercoder/firstthousand

2 files changed

+68
-35
lines changed

‎src/main/java/com/fishercoder/solutions/firstthousand/_860.java‎

Lines changed: 33 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -54,4 +54,37 @@ public boolean lemonadeChange(int[] bills) {
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return true;
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}
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}
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public static class Solution2 {
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/**
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* My original solution on 8/14/2024.
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* You only need to keep track of the number of 5ドル and 10ドル bills at hand.
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*/
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public boolean lemonadeChange(int[] bills) {
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int[] changes = new int[2];//5 and 10
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for (int bill : bills) {
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if (bill == 5) {
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changes[0]++;
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} else if (bill == 10) {
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if (changes[0] <= 0) {
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return false;
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} else {
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changes[0]--;
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}
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changes[1]++;
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} else if (bill == 20) {
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if (changes[1] > 0 && changes[0] > 0) {
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changes[1]--;
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changes[0]--;
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} else if (changes[0] > 2) {
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changes[0] -= 3;
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} else {
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return false;
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}
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}
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}
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return true;
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}
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}
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}

‎src/test/java/com/fishercoder/firstthousand/_860Test.java‎

Lines changed: 35 additions & 35 deletions
Original file line numberDiff line numberDiff line change
@@ -8,41 +8,41 @@
88

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public class _860Test {
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private _860.Solution1 test;
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private static int[] bills;
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private _860.Solution1 test;
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private static int[] bills;
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@BeforeEach
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@BeforeEach
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public void setUp() {
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test = new _860.Solution1();
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}
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@Test
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public void test1() {
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bills = new int[]{5, 5, 5, 10, 20};
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assertEquals(true, test.lemonadeChange(bills));
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}
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@Test
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public void test2() {
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bills = new int[]{5, 5, 10};
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assertEquals(true, test.lemonadeChange(bills));
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}
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@Test
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public void test3() {
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bills = new int[]{10, 10};
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assertEquals(false, test.lemonadeChange(bills));
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}
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@Test
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public void test4() {
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bills = new int[]{5, 5, 10, 10, 20};
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assertEquals(false, test.lemonadeChange(bills));
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}
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@Test
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public void test5() {
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bills = new int[]{5, 5, 5, 20, 5, 5, 5, 10, 20, 5, 10, 20, 5, 20, 5, 10, 5, 5, 5, 5};
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assertEquals(false, test.lemonadeChange(bills));
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}
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test = new _860.Solution1();
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}
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@Test
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public void test1() {
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bills = new int[]{5, 5, 5, 10, 20};
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assertEquals(true, test.lemonadeChange(bills));
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}
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@Test
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public void test2() {
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bills = new int[]{5, 5, 10};
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assertEquals(true, test.lemonadeChange(bills));
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}
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@Test
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public void test3() {
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bills = new int[]{10, 10};
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assertEquals(false, test.lemonadeChange(bills));
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}
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@Test
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public void test4() {
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bills = new int[]{5, 5, 10, 10, 20};
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assertEquals(false, test.lemonadeChange(bills));
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}
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@Test
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public void test5() {
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bills = new int[]{5, 5, 5, 20, 5, 5, 5, 10, 20, 5, 10, 20, 5, 20, 5, 10, 5, 5, 5, 5};
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assertEquals(false, test.lemonadeChange(bills));
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}
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}

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