Lucky Number Problem

User/Java/LuckyNumber

@@ -0,0 +1,25 @@
+import java.util.Scanner;
+
+public class LuckyNumber {
+
+    public static void main(String args[]) {
+        Scanner input = new Scanner(System.in);
+        int n = input.nextInt();
+        int k = input.nextInt();
+        int count = 0;
+        while (n > 0) {
+            int lucky = 0;
+            char result[] = input.next().toCharArray();
+            for (int i = 0; i < result.length; ++i) {
+                if (result[i] == '4' || result[i] == '7') {
+                    lucky += 1;
+                }
+            }
+            if (lucky <= k) {
+                count += 1;
+            }
+            n--;
+        }
+        System.out.println(count);
+    }
+}

User/Java/tanvir.json

@@ -0,0 +1,7 @@
+{
+  "Name": "Tanvir Rahman",
+  "Occupation": "Student",
+  "UserName": "tanviranindo",
+  "StarredTheRepo": true,
+  "FavouriteQuote": "Try harder"
+}