BOJ_5014 : 스타트링크

Author: spring0913

week3/BOJ_5014(스타트링크).java

@@ -0,0 +1,37 @@
+import java.io.*;
+import java.util.*;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int topFloor = Integer.parseInt(st.nextToken());
+        int currentFloor = Integer.parseInt(st.nextToken());
+        int targetFloor = Integer.parseInt(st.nextToken());
+        int up = Integer.parseInt(st.nextToken());
+        int down = Integer.parseInt(st.nextToken());
+
+        int[] visited = new int[topFloor+1];
+        Queue<Integer> q = new LinkedList<>();
+        q.offer(currentFloor);
+        visited[currentFloor] = 1;
+        while(!q.isEmpty()) {
+            int f = q.poll();
+            if(f == targetFloor) {
+                System.out.println(visited[targetFloor]-1);
+                return;
+            }
+            if(f+up <= topFloor && visited[f+up] == 0) {
+                visited[f+up] = visited[f]+1;
+                q.offer(f+up);
+            }
+
+            if(f-down >= 1 && visited[f-down] == 0) {
+                visited[f-down] = visited[f]+1;
+                q.offer(f-down);
+            }
+        }
+        System.out.println("use the stairs");
+    }
+}