Feat: Add solution of #118

src/BaekJoon/Dltmd202/2869/Main.java

@@ -0,0 +1,28 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.StringTokenizer;
+
+/*
+ * 달팽이는 올라가고 싶다
+ * https://www.acmicpc.net/problem/2869
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException {
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int a = Integer.parseInt(st.nextToken());
+        int b = Integer.parseInt(st.nextToken());
+        int v = Integer.parseInt(st.nextToken());
+
+        System.out.println(getDayAfter(a, b, v));
+    }
+
+    private static int getDayAfter(int a, int b, int v) {
+        int leftDistanceExceptLastDay = v - a;
+        int leftDayNeed = (int) Math.ceil((double) leftDistanceExceptLastDay / (a - b));
+        return leftDayNeed + 1;
+    }
+}

src/BaekJoon/Dltmd202/4153/Main.java

@@ -0,0 +1,43 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.Optional;
+import java.util.StringTokenizer;
+
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException {
+        while (true){
+            Optional<int[]> input = getInput();
+            if (input.isEmpty()) break;
+            int[] data = input.get();
+            if(isRightAngle(data)){
+                sb.append("right\n");
+            } else {
+                sb.append("wrong\n");
+            }
+        }
+        System.out.println(sb.toString());
+    }
+
+    private static boolean isRightAngle(int[] data) throws IOException {
+        return data[2] * data[2] == data[0] * data[0] + data[1] * data[1];
+    }
+
+    public static Optional<int[]> getInput() throws IOException {
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int[] data = new int[3];
+        for (int i = 0; i < 3; i++) {
+            data[i] = Integer.parseInt(st.nextToken());
+        }
+        if(data[0] == 0 && data[1] == 0 && data[2] == 0)
+            return Optional.empty();
+        else {
+            Arrays.sort(data);
+            return Optional.of(data);
+        }
+    }
+}