[20250312] BOJ / G3 / 일감호에 다리 놓기 / 신희을

ShinHeeEul/202503/12 BOJ G3 일감호에 다리놓기.md

@@ -0,0 +1,86 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+
+
+	static boolean[] visited;
+	static int N;
+	static ArrayList<Integer>[] lists;
+
+    public static void main(String[] args) throws Exception{
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        int M = Integer.parseInt(st.nextToken());
+        long K = Long.parseLong(st.nextToken());
+
+        visited = new boolean[N + 1];
+
+        st = new StringTokenizer(br.readLine());
+
+        PriorityQueue<Integer[]> pq = new PriorityQueue<>((o1, o2) -> o1[1] - o2[1]);
+
+
+        lists = new ArrayList[N + 1];
+
+        for(int i = 1; i <= N; i++) pq.add(new Integer[] {i, Integer.parseInt(st.nextToken())});
+        for(int i = 1; i < N + 1; i++) lists[i] = new ArrayList<>();
+
+
+
+        for(int i = 0; i < M; i++) {
+        	st = new StringTokenizer(br.readLine());
+
+        	int a = Integer.parseInt(st.nextToken());
+        	int b = Integer.parseInt(st.nextToken());
+
+        	lists[a].add(b);
+        	lists[b].add(a);
+
+        }
+
+        if(M <= 1) {
+        	System.out.println("YES");
+        	return;
+        }
+
+        while(!pq.isEmpty()) {
+        	Integer[] node = pq.poll();
+        	int current = node[0];
+        	if(visited[current]) continue;
+        	K -= node[1];
+
+        	if(K < 0L) break;
+
+        	visited[current] = true;
+        	backTracking(current);
+        }
+
+        System.out.println(K >= 0L ? "YES" : "NO");
+
+    }
+
+    public static void backTracking(int current) {
+
+
+    	int next = current + 1;
+    	if(next == N + 1) next = 1;
+    	int next2 = current - 1;
+    	if(next2 == 0) next2 = N;
+
+    	if(!visited[next] && !lists[current].contains(next)) {
+    		visited[next] = true;
+    		backTracking(next);
+    	}
+    	if(!visited[next2] && !lists[current].contains(next2)) {
+    		visited[next2] = true;
+    		backTracking(next2);
+    	}
+    }
+
+}
+```