[20250909] BOJ / G2 / 쇼핑몰 / 이강현

lkhyun/202509/09 BOJ G2 쇼핑몰.md

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+```java
+
+import java.util.*;
+import java.io.*;
+
+public class Main{
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static StringTokenizer st;
+    static StringBuilder sb = new StringBuilder();
+    static int N,K;
+    static PriorityQueue<long[]> in;
+    static PriorityQueue<long[]> out;
+    public static void main(String[] args) throws Exception {
+        st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        K = Integer.parseInt(st.nextToken());
+
+        in = new PriorityQueue<>((a,b) -> {
+            if(a[0] == b[0]){ //시간이 같으면
+                return Long.compare(a[1], b[1]); //적은 번호에 해당하는 곳
+            }else{
+                return Long.compare(a[0], b[0]);
+            }
+        });
+        out = new PriorityQueue<>((a,b) -> {
+            if(a[0] == b[0]){ //시간이 같으면
+                return Long.compare(b[1], a[1]); //큰 번호에 해당하는 곳
+            }else{
+                return Long.compare(a[0], b[0]);
+            }
+        });
+        for (int i = 1; i <= K; i++) {
+            in.offer(new long[]{0,i});
+        }
+        for (int i = 0; i < N; i++) {
+            st = new StringTokenizer(br.readLine());
+            int num = Integer.parseInt(st.nextToken());
+            int time = Integer.parseInt(st.nextToken());
+            long[] insert = in.poll();
+            insert[0] += time;
+            in.offer(insert);
+            out.offer(new long[]{insert[0],insert[1],num});
+        }
+
+        long ans = 0;
+        for (int i = 1; i <= N; i++) {
+            ans += i*out.poll()[2];
+        }
+        bw.write(ans+"");
+        bw.close();
+    }
+
+}
+```