meituan-009. 小团的装饰物

src/main/java/study/plan/meituan/meituan009/Solution.java

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+package study.plan.meituan.meituan009;
+
+import java.io.*;
+import java.util.*;
+
+public class Solution {
+
+    static Scanner sc;
+    static PrintWriter pw;
+
+    public static void main(String[] args) throws IOException {
+        sc = new Scanner(System.in);
+        pw = new PrintWriter(System.out);
+        solve();
+        pw.close();
+    }
+
+    public static void solve() throws IOException {
+        int n = sc.nextInt();
+        int m = sc.nextInt();
+        int res = 0;
+        int[][] f = new int[m + 1][n + 1];
+        for (int i = 0; i <= n; i++) {
+            f[1][i] = 1;
+        }
+
+        for (int i = 2; i <= m; i++) {
+            for (int j = 1; j <= n; j++) {
+                for (int k = j; k <= n; k += j) {
+                    f[i][k] = (f[i][k] + f[i - 1][j]) % 998244353;
+                }
+            }
+        }
+        for (int i = 1; i <= n; i++) {
+            res = (res + f[m][i]) % 998244353;
+        }
+        pw.println(res);
+    }
+
+    static class Scanner {
+        BufferedReader br;
+        StringTokenizer st;
+
+        public Scanner(InputStream s) {
+            br = new BufferedReader(new InputStreamReader(s));
+        }
+
+        public Scanner(FileReader f) {
+            br = new BufferedReader(f);
+        }
+
+        public String next() throws IOException {
+            while (st == null || !st.hasMoreTokens())
+                st = new StringTokenizer(br.readLine());
+            return st.nextToken();
+        }
+
+        public int nextInt() throws IOException {
+            return Integer.parseInt(next());
+        }
+
+        public long nextLong() throws IOException {
+            return Long.parseLong(next());
+        }
+
+        public double nextDouble() throws IOException {
+            return Double.parseDouble(next());
+        }
+
+        public int[] nextIntArr(int n) throws IOException {
+            int[] arr = new int[n];
+            for (int i = 0; i < n; i++) {
+                arr[i] = Integer.parseInt(next());
+            }
+            return arr;
+        }
+
+    }
+}