adding old solved challenges

BeautifulDay/BeautifulDays.java

@@ -0,0 +1,50 @@
+public class BeautifulDays {
+  public static void main(String[] args) {
+
+    int x = beautifulDays(20 , 23, 2);
+    System.out.println(x);
+  }
+
+  public static int ReverseInt(int a){
+    int revA = 0;
+    int remainder = 0;
+    while (a != 0){
+      remainder = a % 10;
+      revA *= 10;
+      revA += remainder;
+      a = a / 10;
+    }
+    return revA;
+  }
+
+  public static int beautifulDays(int i, int j, int k) {
+
+    int beauxJours = 0;
+    int m =0;
+    int h =0;
+    for (int x = i; x <= j; x++) {
+      m = ReverseInt(x);
+
+       h = (Math.abs(x - m) % k);
+      if (h == 0) {
+
+        beauxJours++;
+      }
+    }
+    System.out.println(m);
+    System.out.println(h);
+    return beauxJours;
+  }
+  /*
+  int count = 0 ;
+    for (int l = i; l <= j; l++) {
+        int m = reverseit(l);
+        if (Math.abs(l-m) % k == 0) {
+            count++;
+            System.out.println(count+")"+l +"-"+reverseit(l) +"="+Math.abs(l-m)+"("+k+")");
+        }
+    }
+    return count ;
+*/
+
+}