CT_374

Author: Jade-Good

BOJ/Java/src/B3/Boj_23972_악마의제안.java

@@ -0,0 +1,23 @@
+package B3;
+
+import java.io.*;
+import java.util.StringTokenizer;
+
+public class Boj_23972_악마의제안 {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        long K = Integer.parseInt(st.nextToken());
+        long N = Integer.parseInt(st.nextToken());
+
+        if (N == 1) bw.write("-1");
+        else {
+            int answer = (int) ((K * N) / (N - 1));
+            if ((K * N) % (N - 1) != 0) answer++;
+            bw.write(Integer.toString(answer));
+        }
+        bw.flush();
+    }
+}