更新

作业/刘航宇-day43/第二题/P2967.java

@@ -0,0 +1,36 @@
+import java.util.*;
+
+public class P2967 {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        if (!in.hasNextLong()) { in.close(); return; }
+        long n = in.nextLong();
+        boolean neg = n < 0;
+        if (neg) n = -n;
+        StringBuilder sb = new StringBuilder();
+        if (neg) sb.append('-');
+        if (n == 1) {
+            sb.append('1');
+            System.out.println(sb.toString());
+            in.close();
+            return;
+        }
+        long p = 2;
+        boolean first = true;
+        while (n > 1 && p * p <= n) {
+            while (n % p == 0) {
+                if (!first) sb.append('*');
+                sb.append(p);
+                first = false;
+                n /= p;
+            }
+            p = (p == 2) ? 3 : (p + 2);
+        }
+        if (n > 1) {
+            if (!first) sb.append('*');
+            sb.append(n);
+        }
+        System.out.println(sb.toString());
+        in.close();
+    }
+}