Merge pull request #1 from prgrms-web-devcourse/1/김유경

1주차 김유경 문제 풀이

Author: kimyou1102

Diff for: 1주차/김유경/같은 숫자는 싫어.js

@@ -0,0 +1,11 @@
+function solution(arr) {
+    const stack = [];
+
+    arr.forEach(number => {
+        if(stack.length && stack[stack.length-1] === number) {
+            stack.pop();
+        }
+        stack.push(number);
+    })
+    return stack;
+}

Diff for: 1주차/김유경/올바른 괄호.js

@@ -0,0 +1,21 @@
+function solution(s){
+    let answer = '';
+    const stack = [];
+    
+    for(let i=0, length = s.length; i < length; i++) {
+        const word = s[i];
+        if(i === 0) {
+            stack.push(word);
+        } else {
+            if(stack[stack.length-1] === '(' && word === ')') {
+                stack.pop();
+            } else {
+                stack.push(word);
+            }
+        }
+        
+    }
+    
+    answer = stack.length === 0;
+    return answer;
+}