結果

問題 No.2370 He ate many cakes
ユーザー tentententen
提出日時 2023-07-04 17:23:31
言語 Java21
(openjdk 21)
結果
AC  
実行時間 562 ms / 2,000 ms
コード長 3,359 bytes
コンパイル時間 2,307 ms
コンパイル使用メモリ 85,356 KB
実行使用メモリ 61,164 KB
最終ジャッジ日時 2024-07-18 12:40:36
合計ジャッジ時間 8,214 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 52 ms
49,856 KB
testcase_01 AC 50 ms
50,060 KB
testcase_02 AC 47 ms
50,352 KB
testcase_03 AC 525 ms
60,540 KB
testcase_04 AC 47 ms
50,128 KB
testcase_05 AC 46 ms
50,088 KB
testcase_06 AC 46 ms
50,212 KB
testcase_07 AC 46 ms
49,936 KB
testcase_08 AC 46 ms
49,816 KB
testcase_09 AC 46 ms
50,212 KB
testcase_10 AC 506 ms
58,824 KB
testcase_11 AC 516 ms
60,448 KB
testcase_12 AC 536 ms
58,896 KB
testcase_13 AC 525 ms
60,568 KB
testcase_14 AC 544 ms
60,652 KB
testcase_15 AC 562 ms
60,780 KB
testcase_16 AC 187 ms
55,944 KB
testcase_17 AC 426 ms
61,164 KB
testcase_18 AC 104 ms
53,488 KB
testcase_19 AC 104 ms
53,488 KB
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ソースコード

diff # 

import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int k = sc.nextInt();
        TreeMap<Long, Integer> evCount = new TreeMap<>();
        TreeMap<Long, Integer> odCount = new TreeMap<>();
        evCount.put(0L, 1);
        odCount.put(0L, 1);
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            TreeMap<Long, Integer> counts;
            if (i % 2 == 0) {
                counts = evCount;
            } else {
                counts = odCount;
            }
            if (x == 0) {
                for (long y : counts.keySet()) {
                    counts.put(y, counts.get(y) * 2);
                }
            } else if (x > 0) {
                Long key = Long.MAX_VALUE;
                while ((key = counts.lowerKey(key)) != null) {
                    counts.put(key + x, counts.getOrDefault(key + x, 0) + counts.get(key));
                }
            } else {
                Long key = Long.MIN_VALUE;
                while ((key = counts.higherKey(key)) != null) {
                    counts.put(key + x, counts.getOrDefault(key + x, 0) + counts.get(key));
                }
            }
        }
        odCount.put(Long.MAX_VALUE, 0);
        int sum = 0;
        Long key = Long.MAX_VALUE;
        while ((key = odCount.lowerKey(key)) != null) {
            sum += odCount.get(key);
            odCount.put(key, sum);
        }
        long left = Long.MIN_VALUE / 3;
        long right = Long.MAX_VALUE / 3;
        while (right - left > 1) {
            long m = (left + right) / 2;
            int current = 0;
            for (long x : evCount.keySet()) {
                current += evCount.get(x) * odCount.ceilingEntry(m - x).getValue();
                if (current > k) {
                    break;
                }
            }
            if (current >= k) {
                left = m;
            } else {
                right = m;
            }
        }
        System.out.println(left);
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}
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