[2022.03.31] 4문제 - 솔루션 추가

level-1/2016년.js

@@ -11,4 +11,20 @@ function solution(a, b) {
     answer = day[(count + 4) % 7]
 
     return answer;
-}
+}
+
+//정답 2 - yongchanson
+function solution(a, b) {
+  const month = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
+  const week = ["THU", "FRI", "SAT", "SUN", "MON", "TUE", "WED"];
+
+  let sum = b;
+  for (
+    let i = 0;
+    i < a - 1;
+    i++ //ex)5월인 경우 1~4월까지 더해준다.
+  )
+    sum += month[i];
+
+  return week[sum % 7]; //1일이 금요일이므로, 0이면 목요일이 출력되어야 한다.
+}

level-1/가운데-글자-가져오기.js

@@ -6,4 +6,15 @@ function solution(s) {
     const length = s.length
     answer = (length % 2) !== 0 ? s[Math.floor(length / 2)] : s.slice((length / 2) - 1, (length / 2) + 1)
     return answer;
-}
+}
+
+//정답 2 - yongchanson
+function solution(s) {
+  var answer = "";
+  let L2 = s.length / 2;
+
+  answer =
+    s.length % 2 == 0 ? s[L2 - 1] + s[L2] : (answer = s[Math.ceil(L2 - 1)]);
+
+  return answer;
+}

level-1/내적.js

@@ -5,4 +5,14 @@ function solution(a, b) {
     var answer = 1234567890;
     answer = a.reduce((x, y, i) => x + y * b[i], 0)
     return answer;
-}
+}
+
+//정답 2 - yongchanson
+function solution(a, b) {
+    var answer = 0;
+
+    for(i=0; i<a.length; i++) {
+        answer += a[i] * b[i]
+    }
+    return answer;
+}

level-1/부족한-금액-계산하기.js

@@ -7,4 +7,21 @@ function solution(price, money, count) {
     for (let i = 1; i <= count; i++) totalCost += price * i
     answer = totalCost <= money ? 0 : totalCost - money
     return answer;
-}
+}
+
+//정답 2 - yongchanson
+function solution(price, money, count) {
+  var answer = 0;
+  let sum = price;
+
+  for (i = 2; i <= count; i++) {
+    sum += price * i;
+  }
+
+  if (sum <= money) {
+    answer = 0;
+  } else {
+    answer = sum - money;
+  }
+  return answer;
+}