first commit

J02021 - LIỆT KÊ TỔ HỢP - 2.java

@@ -0,0 +1,30 @@
+package nyagami;
+
+import java.util.Scanner;
+import java.util.Stack;
+
+public class test{
+    static int n, k, cnt=0;
+    static void Try(int i, int start, int[] res){
+        if(i==k){
+            cnt++;
+            for(int j=0; j<k; j++){
+                System.out.print(res[j]);
+            }
+            System.out.print(" ");
+            return;
+        }
+        for(int u=start; u<=n-k+i+1 ; u++){
+            res[i]=u;
+            Try(i+1,u+1,res);
+        }
+    }
+    public static void main(String[] arg){
+        Scanner sc = new Scanner(System.in);
+        n = sc.nextInt(); k = sc.nextInt();
+        int[] res = new int[k];
+        Try(0,1,res);
+        System.out.printf("\nTong cong co %d to hop", cnt);
+        sc.close();
+    }
+}