Merge pull request #304 from leetaggg/main

이태호 / 10월 4주차 / 목

LeeTaeHo/boj/boj16120.java

@@ -0,0 +1,37 @@
+import java.io.*;
+import java.util.*;
+
+public class boj16120 {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        char[] ppap = br.readLine().toCharArray();
+        if (isPPAP(ppap)) {
+            System.out.println("PPAP");
+        } else {
+            System.out.println("NP");
+        }
+    }
+
+    static boolean isPPAP(char[] ppap) {
+        if (ppap.length < 4) {
+            return ppap.length == 1 && ppap[0] == 'P';
+        }
+
+        Stack<Character> s = new Stack<>();
+
+        for (int i = 0; i < 3; i++) {
+            s.push(ppap[i]);
+        }
+
+        for (int i = 3; i < ppap.length; i++) {
+            if (s.size() >= 3 && ppap[i] == 'P' && s.elementAt(s.size() - 1) == 'A' && s.elementAt(s.size() - 2) == 'P' && s.elementAt(s.size() - 3) == 'P') {
+                for (int j = 0; j < 3; j++) {
+                    s.pop();
+                }
+            }
+            s.push(ppap[i]);
+        }
+
+        return s.size() == 1 && s.peek() == 'P';
+    }
+}

LeeTaeHo/boj/boj2467.java

@@ -0,0 +1,43 @@
+import java.io.*;
+import java.util.*;
+
+public class boj2467 {
+    public static void main(String[] args) throws IOException{
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        int n = Integer.parseInt(br.readLine());
+
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        int[] arr = new int[n];
+
+        for (int i = 0; i < n; i++) {
+            arr[i] = Integer.parseInt(st.nextToken());
+        }
+
+        int left = 0;
+        int right = arr.length - 1;
+        int sum = 0;
+
+        int resultLeft = 0;
+        int resultRight = 0;
+        int minValue = Integer.MAX_VALUE;
+
+        while(left < right){
+            sum = arr[left] + arr[right];
+            if(Math.abs(minValue) > Math.abs(sum)){
+                minValue = sum;
+                resultLeft = left;
+                resultRight = right;
+            }
+            if(sum == 0){
+                break;
+            }else if(sum < 0){
+                left++;
+            }else{
+                right--;
+            }
+        }
+        System.out.println(arr[resultLeft] + " " + arr[resultRight]);
+    }
+}