[0621] Programmers_kim

0621/Programmers/Lv1/나머지가 1이 되는 수 찾기_kim.java

@@ -0,0 +1,15 @@
+package study_0621;
+
+public class Lv1_나머지가1이되는수 {
+	public static void main(String[] args) {
+		int n = 12;
+		int ans = 0;
+		for(int i = 2; i < n; i++) {
+			if(n % i == 1) {
+				ans = i;
+				break;
+			}
+		}
+	}
+
+}

0621/Programmers/Lv2/짝지어 제거하기_kim.java

@@ -0,0 +1,31 @@
+package study_0621;
+
+import java.util.Stack;
+
+public class Lv2_짝지어제거하기2 {
+	public static void main(String[] args) {
+		String a = "cdcd";
+		System.out.println(solution(a));
+	}
+
+	public static int solution(String s) {
+
+		Stack<Character> stack = new Stack<>(); 
+		for(int i = 0; i < s.length(); i++) {
+			if(!stack.isEmpty()&&stack.peek() == s.charAt(i)) {
+				stack.pop();
+			}else {
+				stack.add(s.charAt(i));
+			}
+		}
+
+		if(stack.size() == 0) {
+			return 1;
+		}else {
+			return 0;
+		}
+
+
+	}
+
+}