結果

問題 No.1280 Beyond C
ユーザー ywmtywmt
提出日時 2020-11-06 21:33:11
言語 Java21
(openjdk 21)
結果
AC  
実行時間 237 ms / 2,000 ms
コード長 4,965 bytes
コンパイル時間 2,360 ms
コンパイル使用メモリ 74,728 KB
実行使用メモリ 55,336 KB
最終ジャッジ日時 2023-09-29 18:17:57
合計ジャッジ時間 5,490 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge14
このコードへのチャレンジ
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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 40 ms
49,748 KB
testcase_01 AC 40 ms
49,552 KB
testcase_02 AC 40 ms
49,612 KB
testcase_03 AC 40 ms
49,372 KB
testcase_04 AC 39 ms
49,320 KB
testcase_05 AC 38 ms
49,480 KB
testcase_06 AC 44 ms
49,296 KB
testcase_07 AC 39 ms
49,336 KB
testcase_08 AC 41 ms
49,476 KB
testcase_09 AC 38 ms
49,324 KB
testcase_10 AC 39 ms
49,364 KB
testcase_11 AC 42 ms
49,332 KB
testcase_12 AC 41 ms
49,308 KB
testcase_13 AC 42 ms
49,424 KB
testcase_14 AC 43 ms
49,372 KB
testcase_15 AC 167 ms
53,616 KB
testcase_16 AC 126 ms
53,956 KB
testcase_17 AC 162 ms
54,496 KB
testcase_18 AC 105 ms
53,320 KB
testcase_19 AC 106 ms
53,164 KB
testcase_20 AC 237 ms
55,280 KB
testcase_21 AC 230 ms
54,752 KB
testcase_22 AC 219 ms
55,336 KB
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ソースコード

diff # 

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;

public class Main {
    static PrintWriter out;
    static InputReader ir;

    static void solve() {
        int n = ir.nextInt();
        int m = ir.nextInt();
        long c = ir.nextLong();
        long[] a = ir.nextLongArray(n);
        long[] b = ir.nextLongArray(m);
        Arrays.sort(a);
        long res = 0;
        for (int i = 0; i < m; i++) {
            res += n - upper_bound(a, 0, n - 1, c / b[i]);
        }
        out.println(1.0 * res / n / m);
    }

    public static int upper_bound(long[] a, int fromIndex, int toIndex, long val) {
        if (val >= a[toIndex])
            return toIndex + 1;
        if (val < a[fromIndex])
            return fromIndex;
        int lb = fromIndex - 1, ub = toIndex;
        while (ub - lb > 1) {
            int mid = (ub - lb) / 2 + lb;
            if (a[mid] > val) {
                ub = mid;
            } else {
                lb = mid;
            }
        }
        return ub;
    }

    public static void main(String[] args) {
        ir = new InputReader(System.in);
        out = new PrintWriter(System.out);
        solve();
        out.flush();
    }

    static class InputReader {

        private InputStream in;
        private byte[] buffer = new byte[1024];
        private int curbuf;
        private int lenbuf;

        public InputReader(InputStream in) {
            this.in = in;
            this.curbuf = this.lenbuf = 0;
        }

        public boolean hasNextByte() {
            if (curbuf >= lenbuf) {
                curbuf = 0;
                try {
                    lenbuf = in.read(buffer);
                } catch (IOException e) {
                    throw new InputMismatchException();
                }
                if (lenbuf <= 0)
                    return false;
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte())
                return buffer[curbuf++];
            else
                return -1;
        }

        private boolean isSpaceChar(int c) {
            return !(c >= 33 && c <= 126);
        }

        private void skip() {
            while (hasNextByte() && isSpaceChar(buffer[curbuf]))
                curbuf++;
        }

        public boolean hasNext() {
            skip();
            return hasNextByte();
        }

        public String next() {
            if (!hasNext())
                throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (!isSpaceChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public int nextInt() {
            if (!hasNext())
                throw new NoSuchElementException();
            int c = readByte();
            while (isSpaceChar(c))
                c = readByte();
            boolean minus = false;
            if (c == '-') {
                minus = true;
                c = readByte();
            }
            int res = 0;
            do {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res = res * 10 + c - '0';
                c = readByte();
            } while (!isSpaceChar(c));
            return (minus) ? -res : res;
        }

        public long nextLong() {
            if (!hasNext())
                throw new NoSuchElementException();
            int c = readByte();
            while (isSpaceChar(c))
                c = readByte();
            boolean minus = false;
            if (c == '-') {
                minus = true;
                c = readByte();
            }
            long res = 0;
            do {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res = res * 10 + c - '0';
                c = readByte();
            } while (!isSpaceChar(c));
            return (minus) ? -res : res;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }

        public int[] nextIntArray(int n) {
            int[] a = new int[n];
            for (int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }

        public long[] nextLongArray(int n) {
            long[] a = new long[n];
            for (int i = 0; i < n; i++)
                a[i] = nextLong();
            return a;
        }

        public char[][] nextCharMap(int n, int m) {
            char[][] map = new char[n][m];
            for (int i = 0; i < n; i++)
                map[i] = next().toCharArray();
            return map;
        }
    }

    static void tr(Object... o) {
        System.err.println(Arrays.deepToString(o));
    }
}
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