Create Solution.java

Author: Jerring

solution/0441.Arranging Coins/Solution.java

@@ -0,0 +1,11 @@
+class Solution {
+    public int arrangeCoins(int n) {
+        int l = 0, r = n;
+        while (l < r) {
+            int mid = l + r + 1 >>> 1;
+            if (1L * mid * (mid + 1) / 2 <= n) l = mid;
+            else r = mid - 1;
+        }
+        return r;
+    }
+}