Add 부족한-금액-계산하기.js

Author: prove-ability

level-1/부족한-금액-계산하기.js

@@ -36,4 +36,14 @@ function solution(price, money, count) {
       return 0;
   }
   return sum_price - money;
+}
+
+//정답 3 - prove-ability
+function solution(price, money, count) {
+  let sum = 0;
+  for(let i = 1; i <= count; i++) {
+      sum += (i * price)
+  }
+  
+  return sum < money ? 0 : sum - money;
 }