[20250325] BOJ / P2 / 백설공주와 난쟁이 / 권혁준

khj20006/202503/25 BOJ P2 백설공주와 난쟁이.md

@@ -0,0 +1,98 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+class Edge{
+	int s, e;
+	double c;
+	Edge(int s, int e, double c){
+		this.s = s;
+		this.e = e;
+		this.c = c;
+	}
+}
+
+class Main {
+
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st = new StringTokenizer("");
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static String nextToken() throws Exception {
+		while(!st.hasMoreTokens()) nextLine();
+		return st.nextToken();
+	}
+	static int nextInt() throws Exception { return Integer.parseInt(nextToken()); }
+	static long nextLong() throws Exception { return Long.parseLong(nextToken()); }
+	static double nextDouble() throws Exception { return Double.parseDouble(nextToken()); }
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+
+	// Additional field
+
+	static int N, C, M;
+	static int[] A;
+	static List<Integer>[] Idx;
+	static Random rd = new Random();
+
+	public static void main(String[] args) throws Exception {
+
+		ready();
+		solve();
+
+		bwEnd();
+
+	}
+
+	static void ready() throws Exception{
+
+		N = nextInt();
+		C = nextInt();
+		A = new int[N+1];
+		Idx = new List[C+1];
+		for(int i=1;i<=C;i++) Idx[i] = new ArrayList<>();
+
+		for(int i=1;i<=N;i++) {
+			A[i] = nextInt();
+			Idx[A[i]].add(i);
+		}
+
+	}
+
+	static void solve() throws Exception{
+
+		for(M=nextInt();M-->0;) {
+			int a = nextInt(), b = nextInt();
+
+			int res = -1;
+			for(int i=0;i<100;i++) {
+				int x = A[a + rd.nextInt(b-a+1)];
+
+				int cnt = lowerBound(x,b) - lowerBound(x,a-1);
+				if(cnt > (b-a+1)/2) {
+					res = x;
+					break;
+				}
+
+			}
+			if(res == -1) bw.write("no\n");
+			else bw.write("yes " + res + "\n");
+		}
+
+	}
+
+	static int lowerBound(int k, int x) {
+		int s = 0, e = Idx[k].size(), m = (s+e)>>1;
+		while(s<e) {
+			if(Idx[k].get(m) <= x) s = m+1;
+			else e = m;
+			m = (s+e)>>1;
+		}
+		return m;
+	}
+
+}
+
+```