diff --git a/programmers/[3차] n진수 게임/solution.java b/programmers/[3차] n진수 게임/solution.java
new file mode 100644
index 0000000..cc9adf5
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+++ b/programmers/[3차] n진수 게임/solution.java	
@@ -0,0 +1,47 @@
+// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/17687
+
+import java.lang.StringBuilder;
+class Solution {
+    public String solution(int n, int t, int m, int p) {
+        StringBuilder sb = new StringBuilder(), sb2 = new StringBuilder();
+        int end = (t-1)*m+p, num = 0;
+        while(sb.length() <= end){
+            sb.append(trs(num++,n));
+        }
+        for(int a = 0; a < t; a++){
+            sb2.append(sb.charAt(a*m+p-1));
+        }
+        //System.out.println(sb);
+        return sb2.toString();
+    }
+    private String trs(int num,int n){
+        StringBuilder tn = new StringBuilder();
+        int x = num;
+        
+        while(num>=0){
+            int temp = num%n;
+            String nt;
+            switch(temp){
+                case 10: nt = "A";
+                    break;
+                case 11: nt = "B";
+                    break;
+                case 12: nt = "C";
+                    break;
+                case 13: nt = "D";
+                    break;
+                case 14: nt = "E";
+                    break;
+                case 15: nt = "F";
+                    break;
+                default: nt = null;
+                    break;
+            }
+            if(nt!=null) tn.append(nt);
+            else tn.append(temp);
+            num=num/n;
+            if(num==0) break;
+        }
+        return tn.reverse().toString();
+    }
+}
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