結果

問題 No.507 ゲーム大会(チーム決め)
ユーザー bennkei0327bennkei0327
提出日時 2017-04-28 00:12:49
言語 Java21
(openjdk 21)
結果
AC  
実行時間 321 ms / 3,000 ms
コード長 4,693 bytes
コンパイル時間 3,725 ms
コンパイル使用メモリ 77,316 KB
実行使用メモリ 55,456 KB
最終ジャッジ日時 2023-10-11 16:15:06
合計ジャッジ時間 7,575 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge12
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 46 ms
49,588 KB
testcase_01 AC 46 ms
49,256 KB
testcase_02 AC 46 ms
49,864 KB
testcase_03 AC 46 ms
49,496 KB
testcase_04 AC 45 ms
49,412 KB
testcase_05 AC 45 ms
49,496 KB
testcase_06 AC 44 ms
49,548 KB
testcase_07 AC 321 ms
55,324 KB
testcase_08 AC 302 ms
55,184 KB
testcase_09 AC 155 ms
52,972 KB
testcase_10 AC 148 ms
52,908 KB
testcase_11 AC 160 ms
53,024 KB
testcase_12 AC 157 ms
52,972 KB
testcase_13 AC 304 ms
55,456 KB
testcase_14 AC 201 ms
53,852 KB
testcase_15 AC 199 ms
54,224 KB
testcase_16 AC 199 ms
54,040 KB
testcase_17 AC 46 ms
49,472 KB
testcase_18 AC 46 ms
49,596 KB
testcase_19 AC 45 ms
49,320 KB
testcase_20 AC 45 ms
49,268 KB
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ソースコード

diff # 

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


public class Main_yukicoder507_1 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();
		int m = sc.nextInt();

		int ks = sc.nextInt();
		int[] a = new int[n - 1];
		for (int i = 0; i < n - 1; i++) {
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);

		int l = -1;
		int r = n - 1;
		while (r - l > 1) {
			int mid = l + (r - l) / 2;
			if (isOK(a, ks, mid, m)) {
				r = mid;
			} else {
				l = mid;
			}
		}

		if (r == n - 1) {
			pr.println(-1);
		} else {
			pr.println(a[r]);
		}
	}

	private static boolean isOK(int[] a, int ks, int mid, int m) {
		int n = a.length;

		int t = ks + a[mid];

		int cnt = 0;
		for (int i = 0, j = n - 1; i < j;) {
			if (j == mid) {
				j--;
			} else if (i == mid) {
				i++;
			} else {
				if (a[i] + a[j] <= t) {
					i++;
				} else {
					cnt++;
					i++;
					j--;
				}
			}
		}

		if (cnt < m) {
			return true;
		} else {
			return false;
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;

		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}

		private boolean isPrintable(int ch) {
			return ch >= '!' && ch <= '~';
		}

		private boolean isCRLF(int ch) {
			return ch == '\n' || ch == '\r' || ch == -1;
		}

		private int nextPrintable() {
			try {
				int ch;
				while (!isPrintable(ch = br.read())) {
					if (ch == -1) {
						throw new NoSuchElementException();
					}
				}

				return ch;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		String next() {
			try {
				int ch = nextPrintable();
				StringBuilder sb = new StringBuilder();
				do {
					sb.appendCodePoint(ch);
				} while (isPrintable(ch = br.read()));

				return sb.toString();
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		int nextInt() {
			try {
				// parseInt from Integer.parseInt()
				boolean negative = false;
				int res = 0;
				int limit = -Integer.MAX_VALUE;
				int radix = 10;

				int fc = nextPrintable();
				if (fc < '0') {
					if (fc == '-') {
						negative = true;
						limit = Integer.MIN_VALUE;
					} else if (fc != '+') {
						throw new NumberFormatException();
					}
					fc = br.read();
				}
				int multmin = limit / radix;

				int ch = fc;
				do {
					int digit = ch - '0';
					if (digit < 0 || digit >= radix) {
						throw new NumberFormatException();
					}
					if (res < multmin) {
						throw new NumberFormatException();
					}
					res *= radix;
					if (res < limit + digit) {
						throw new NumberFormatException();
					}
					res -= digit;

				} while (isPrintable(ch = br.read()));

				return negative ? res : -res;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		long nextLong() {
			try {
				// parseLong from Long.parseLong()
				boolean negative = false;
				long res = 0;
				long limit = -Long.MAX_VALUE;
				int radix = 10;

				int fc = nextPrintable();
				if (fc < '0') {
					if (fc == '-') {
						negative = true;
						limit = Long.MIN_VALUE;
					} else if (fc != '+') {
						throw new NumberFormatException();
					}
					fc = br.read();
				}
				long multmin = limit / radix;

				int ch = fc;
				do {
					int digit = ch - '0';
					if (digit < 0 || digit >= radix) {
						throw new NumberFormatException();
					}
					if (res < multmin) {
						throw new NumberFormatException();
					}
					res *= radix;
					if (res < limit + digit) {
						throw new NumberFormatException();
					}
					res -= digit;

				} while (isPrintable(ch = br.read()));

				return negative ? res : -res;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		float nextFloat() {
			return Float.parseFloat(next());
		}

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

		String nextLine() {
			try {
				int ch;
				while (isCRLF(ch = br.read())) {
					if (ch == -1) {
						throw new NoSuchElementException();
					}
				}
				StringBuilder sb = new StringBuilder();
				do {
					sb.appendCodePoint(ch);
				} while (!isCRLF(ch = br.read()));

				return sb.toString();
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new NoSuchElementException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}
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