Create 백준_14607_피자.java

Author: ksoheee

2025-09-09/김소희/백준_14607_피자.java

@@ -0,0 +1,9 @@
+import java.util.*;
+import java.io.*;
+public class Main {   
+	public static void main(String[] args) throws IOException {
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        long N = Integer.parseInt(br.readLine());
+        System.out.println((N*(N-1))/2);
+    }
+}