diff --git a/knoda/src/B077_TicketOffice.java b/knoda/src/B077_TicketOffice.java
new file mode 100644
index 0000000000000000000000000000000000000000..4b459be1040edaa86b7b8d27e56bcd582da9dac0
--- /dev/null
+++ b/knoda/src/B077_TicketOffice.java
@@ -0,0 +1,96 @@
+package hellojunit;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class B077_TicketOffice {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		
+		// チケットカウンターの数(counterNum)と並んでいる人数(customerNum)を入力する
+		final int counterNum = scan.nextInt();
+		final int customerNum = scan.nextInt();
+		
+		// counterTimeList : それぞれのチケットカウンターで購入するのにかかる時間を格納したリスト
+		final List<Integer> counterTimeList = new ArrayList<Integer>();
+		// それぞれのチケットカウンターでの購入時間を入力する
+		for (int counter = 0; counter < counterNum; counter++) {
+			counterTimeList.add(scan.nextInt());		
+		}
+		
+		TicketOffice ticketOffice = new TicketOffice(counterTimeList, customerNum);
+		System.out.println(ticketOffice.getTime());
+		scan.close();
+	}
+
+}
+
+// チケット売り場クラス
+class TicketOffice {
+	private final List<Integer> counterTimeList;
+	// currentCounterTimeList : それぞれのチケットカウンターでの、お客様の残り購入時間を格納したリスト
+	private List<Integer> currentCounterTimeList = new ArrayList<Integer>();
+	private final int customerNum;
+	
+	public TicketOffice(final List<Integer> counterTimeList, final int customerNum) {
+		this.counterTimeList = counterTimeList;
+		this.customerNum = customerNum;
+	}
+	
+	// 経過時間を取得する
+	public int getTime() {
+		setUp();
+		int time = 0; // time : 経過時間
+		int counter;
+		
+		for (int customer = 0; customer < customerNum; customer++) {
+			// カウンターが空いていないとき
+			while ((counter = getEmptyCounter()) == -1) {
+				updateCurrentCounterTime();
+				time++;
+			}
+			currentCounterTimeList.set(counter, counterTimeList.get(counter));
+		}
+		
+		int maxCounterTime = 0;
+		for (int c = 0; c < currentCounterTimeList.size(); c++) {
+			if (maxCounterTime < currentCounterTimeList.get(c)) {
+				maxCounterTime = currentCounterTimeList.get(c);
+			}
+		}
+		time += maxCounterTime;
+		return time;
+	}
+	
+	// それぞれのチケットカウンターでの、お客様の残り購入時間を0に初期化
+	private void setUp() {
+		for (int counter = 0; counter < counterTimeList.size(); counter++) {
+			currentCounterTimeList.add(0);
+		}
+	}
+	
+	// どのカウンターが空いているかを取得する
+	private int getEmptyCounter() {
+		int emptyCounter = -1;
+		int minCounterTime = 1000;
+		for (int counter = 0; counter < currentCounterTimeList.size(); counter++) {
+			if (currentCounterTimeList.get(counter) == 0) {
+				if (counterTimeList.get(counter) < minCounterTime) {
+					minCounterTime = counterTimeList.get(counter);
+					emptyCounter = counter;
+				}
+			}
+		}
+		return emptyCounter;
+	}
+	
+	// それぞれのカウンターの残り時間をカウントダウンをする
+	private void updateCurrentCounterTime() {
+		for (int counter = 0; counter < currentCounterTimeList.size(); counter++) {
+			currentCounterTimeList.set(counter, currentCounterTimeList.get(counter) - 1);
+		}
+	}
+	
+}
diff --git a/knoda/test/B077_TicketOfficeTest.java b/knoda/test/B077_TicketOfficeTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..fe5f91f76056b6757e2c6e791a20606ea26af55c
--- /dev/null
+++ b/knoda/test/B077_TicketOfficeTest.java
@@ -0,0 +1,58 @@
+package hellojunit;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+
+public class B077_TicketOfficeTest {
+	List<Integer> counterTimeList;
+	int customerNum;
+	TicketOffice sut;
+
+	@Test
+	public void チケットカウンターでの購入時間が2_4_5のとき全体で8かかる() {
+		counterTimeList = new ArrayList<Integer>();
+		int customerNum = 6;
+		counterTimeList.add(2);
+		counterTimeList.add(4);
+		counterTimeList.add(5);
+		
+		sut = new TicketOffice(counterTimeList, customerNum);
+		int expected = 8;
+		int actual = sut.getTime();
+		assertThat(actual, is(expected));
+	}
+	
+	@Test
+	public void チケットカウンターでの購入時間が1_1_1_1_100のとき全体で100かかる() {
+		counterTimeList = new ArrayList<Integer>();
+		int customerNum = 10;
+		counterTimeList.add(1);
+		counterTimeList.add(1);
+		counterTimeList.add(1);
+		counterTimeList.add(1);
+		counterTimeList.add(100);
+		
+		sut = new TicketOffice(counterTimeList, customerNum);
+		int expected = 100;
+		int actual = sut.getTime();
+		assertThat(actual, is(expected));
+	}
+	
+	@Test
+	public void チケットカウンターでの購入時間が2_1のとき全体で3かかる() {
+		counterTimeList = new ArrayList<Integer>();
+		int customerNum = 4;
+		counterTimeList.add(2);
+		counterTimeList.add(1);
+		
+		sut = new TicketOffice(counterTimeList, customerNum);
+		int expected = 3;
+		int actual = sut.getTime();
+		assertThat(actual, is(expected));
+	}
+}