[20250310] BOJ / P4 / 교차 집합 크기 합 / 권혁준

khj20006/202503/10 BOJ P4 교차 집합 크기 합.md

@@ -0,0 +1,90 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+
+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;
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+	static long nextLong() {return Long.parseLong(st.nextToken());}
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+
+	// Additional field
+
+	static long[] C = new long[1000001];
+	static long[] ans;
+	static List<Integer> A = new ArrayList<>();
+	static int N;
+	static long[] F = new long[1000001];
+
+	static final long mod = 998244353;
+
+	public static void main(String[] args) throws Exception {
+
+		ready();
+		solve();
+
+		bwEnd();
+
+	}
+
+	static void ready() throws Exception{
+
+
+		N = Integer.parseInt(br.readLine());
+		for(int p=0;p<N;p++) {
+			nextLine();
+			for(int i=nextInt();i-->0;) A.add(nextInt());
+		}
+		Collections.sort(A);
+		for(int i=0;i<A.size();) {
+			int cnt = 0, a = A.get(i);
+			while(i<A.size() && A.get(i).equals(a)) {
+				cnt++;
+				i++;
+			}
+			C[cnt]++;
+		}
+
+		ans = new long[N+1];
+
+		F[0] = 1;
+		for(int i=1;i<=N;i++) F[i] = (F[i-1] * i) % mod;
+
+	}
+
+	static void solve() throws Exception{
+
+		for(int i=1;i<=N;i++) if(C[i] > 0) {
+			for(int k=1;k<=i;k++) {
+				ans[k] = (ans[k] + C[i] * comb(i, k)) % mod;
+			}			
+		}
+
+		for(int i=1;i<=N;i++) bw.write(ans[i] + "\n");
+
+	}
+
+	static long comb(int n, int k) {
+		return F[n] * power(F[k],mod-2) % mod * power(F[n-k],mod-2) % mod;
+	}
+
+	static long power(long n, long m) {
+		if(m == 0) return 1;
+		if(m == 1) return n;
+		long p = power(n,m>>1) % mod;
+		p = (p*p) % mod;
+		if(m%2 == 0) return p;
+		return p*n%mod;
+	}
+
+}
+
+```