Create account-balance-after-rounded-purchase.cpp

kamyu104 · Aug 7, 2023 · 076644c · 076644c
1 parent 570f827
commit 076644c
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/C++/account-balance-after-rounded-purchase.cpp b/C++/account-balance-after-rounded-purchase.cpp
@@ -0,0 +1,10 @@
+// Time:  O(1)
+// Space: O(1)
+
+// math
+class Solution {
+public:
+    int accountBalanceAfterPurchase(int purchaseAmount) {
+        return 100 - (purchaseAmount + 5) / 10 * 10;
+    }
+};