20230926 이기진 2문제

이기진/0926week28/알파벳블록.java

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+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.Stack;
+import java.util.StringTokenizer;
+
+public class 알파벳블록 {
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
+        int n  = Integer.parseInt(bf.readLine());
+        StringTokenizer st;
+        Deque<Character> deque = new ArrayDeque<>();
+        Stack<Integer> stack = new Stack<>();
+        for(int i = 0; i < n; i++){
+            st = new StringTokenizer(bf.readLine());
+            if(st.countTokens() == 1){
+                if(!stack.empty()) {
+                    if(stack.pop() == 1) {
+                        deque.pollLast();
+                    }
+                    else {
+                        deque.pollFirst();
+                    }
+                }
+            }
+            else{
+                stack.push(Integer.parseInt(st.nextToken()));
+                char c = st.nextToken().charAt(0);
+                if(stack.peek() == 1){
+                    deque.addLast(c);
+                }
+                else{
+                    deque.addFirst(c);
+                }
+            }
+        }
+        StringBuilder sb = new StringBuilder();
+
+        if(deque.size() == 0){
+            sb.append(0);
+        }
+        else{
+            while(!deque.isEmpty()) {
+                sb.append(deque.pollFirst());
+            }
+        }
+        System.out.println(sb);
+    }
+
+}

이기진/0926week28/어드벤쳐게임.java

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+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.StringTokenizer;
+
+public class 어드벤쳐게임 {
+    static ArrayList<Integer>[] linkRoom;
+    static char[] rType;
+    static int[] mInfo;
+    static int N;
+    static boolean flag;
+    static boolean[] visited;
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st;
+        StringBuilder ans = new StringBuilder();
+        N = 0;
+        while((N = Integer.parseInt(br.readLine())) != 0) {
+            rType = new char[N+1];
+            linkRoom = new ArrayList[N+1];
+            mInfo = new int[N+1];
+            visited = new boolean[N+1];
+            for(int i=1; i<=N; i++) {
+                st = new StringTokenizer(br.readLine());
+                rType[i] = st.nextToken().charAt(0);
+                mInfo[i] = Integer.parseInt(st.nextToken());
+                linkRoom[i] = new ArrayList<>();
+                int roomNum = 0;
+                while((roomNum = Integer.parseInt(st.nextToken())) != 0) {
+                    linkRoom[i].add(roomNum);
+                }
+            }
+            flag = false;
+            goDfs(1, 0);
+            if(flag) {
+                System.out.println("Yes");
+            }
+            else
+                System.out.println("No");
+        }
+    }
+
+    private static void goDfs(int room, int money) {
+        if(flag) return;
+        if(room == N) {
+            flag = true;
+            return;
+        }
+
+        for(int i =0; i<linkRoom[room].size(); i++) {
+
+            int rNum = linkRoom[room].get(i);
+
+            if(visited[rNum]) continue;
+            if(rType[rNum] == 'L') {
+                if(mInfo[rNum] > money) {
+                    money = mInfo[rNum];
+                }
+            } else if(rType[rNum] == 'T') {
+                if(mInfo[rNum] <= money) {
+                    money -= mInfo[rNum];
+                } else {
+                    return;
+                }
+            }
+            visited[rNum] = true;
+            goDfs(rNum, money);
+            visited[rNum] = false;
+        }
+        return;
+    }
+}