結果

問題 No.728 ギブ and テイク
ユーザー 37zigen37zigen
提出日時 2018-08-25 12:06:42
言語 Java21
(openjdk 21)
結果
AC  
実行時間 807 ms / 3,000 ms
コード長 3,650 bytes
コンパイル時間 4,362 ms
コンパイル使用メモリ 76,584 KB
実行使用メモリ 105,896 KB
最終ジャッジ日時 2023-09-07 12:52:17
合計ジャッジ時間 10,699 ms
ジャッジサーバーID
(参考情報)
judge15 / judge11
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 43 ms
49,172 KB
testcase_01 AC 40 ms
49,108 KB
testcase_02 AC 43 ms
49,112 KB
testcase_03 AC 42 ms
48,884 KB
testcase_04 AC 42 ms
49,228 KB
testcase_05 AC 42 ms
49,156 KB
testcase_06 AC 41 ms
48,924 KB
testcase_07 AC 42 ms
49,052 KB
testcase_08 AC 42 ms
48,860 KB
testcase_09 AC 42 ms
49,248 KB
testcase_10 AC 43 ms
49,388 KB
testcase_11 AC 45 ms
49,128 KB
testcase_12 AC 46 ms
49,008 KB
testcase_13 AC 119 ms
55,184 KB
testcase_14 AC 143 ms
57,344 KB
testcase_15 AC 105 ms
55,016 KB
testcase_16 AC 140 ms
57,312 KB
testcase_17 AC 132 ms
57,336 KB
testcase_18 AC 536 ms
82,956 KB
testcase_19 AC 584 ms
84,048 KB
testcase_20 AC 657 ms
89,452 KB
testcase_21 AC 582 ms
85,524 KB
testcase_22 AC 269 ms
65,652 KB
testcase_23 AC 195 ms
60,768 KB
testcase_24 AC 452 ms
77,476 KB
testcase_25 AC 527 ms
76,604 KB
testcase_26 AC 287 ms
65,196 KB
testcase_27 AC 807 ms
105,896 KB
testcase_28 AC 327 ms
86,180 KB
testcase_29 AC 42 ms
48,880 KB
testcase_30 AC 41 ms
48,956 KB
testcase_31 AC 40 ms
49,012 KB
testcase_32 AC 41 ms
49,120 KB
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ソースコード

diff #

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	class BIT {
		int n;
		long[] v;

		public BIT(int n_) {
			n = n_;
			v = new long[n + 1];
		}

		void add(int k, long val) {
			++k;
			while (k <= n) {
				v[k] += val;
				k += k & -k;
			}
		}

		long sum(int k) {
			++k;
			k = Math.min(k, n);
			long ret = 0;
			while (k > 0) {
				ret += v[k];
				k -= k & -k;
			}
			return ret;
		}

		long sum(long a, long b) {
			return sum((int) b) - sum((int) a - 1);
		}
	}

	void run() {
		Scanner sc = new Scanner();
		int N = sc.nextInt();
		long[][] A = new long[N][3];
		for (int i = 0; i < N; ++i) {
			A[i][0] = sc.nextLong();
		}
		for (int i = 0; i < N; ++i) {
			A[i][1] = sc.nextLong();
			A[i][2] = sc.nextLong();
		}
		ArrayList<Integer>[] rm = new ArrayList[N];
		for (int i = 0; i < N; ++i)
			rm[i] = new ArrayList<>();
		BIT bit = new BIT(N);
		long ans = 0;
		for (int i = 0; i < N; ++i) {
			{// A[m][0]>=A[i][0]-A[i][1]となる最小のmを求めたい
				int ok = N - 1, ng = -1;
				while (ok - ng > 1) {
					int m = (ok + ng) / 2;
					if (A[m][0] >= A[i][0] - A[i][1]) {
						ok = m;
					} else {
						ng = m;
					}
				}
				ans += bit.sum(ok, i);
			}
			bit.add(i, 1);
			// A[m][0] <= A[i][0] + A[i][2]なる最大のmを求めたい

			{
				int ok = i, ng = N;
				while (ng - ok > 1) {
					int m = (ok + ng) / 2;
					if (A[m][0] <= A[i][0] + A[i][2]) {
						ok = m;
					} else {
						ng = m;
					}
				}
				rm[ok].add(i);
			}
			for (int v : rm[i]) {
				bit.add(v, -1);
			}
		}
		System.out.println(ans);
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

	class Scanner {
		private final InputStream in = System.in;
		private final byte[] buffer = new byte[1024];
		private int ptr = 0;
		private int buflen = 0;

		private boolean hasNextByte() {
			if (ptr < buflen) {
				return true;
			} else {
				ptr = 0;
				try {
					buflen = in.read(buffer);
				} catch (IOException e) {
					e.printStackTrace();
				}
				if (buflen <= 0) {
					return false;
				}
			}
			return true;
		}

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

		private boolean isPrintableChar(int c) {
			return 33 <= c && c <= 126;
		}

		public boolean hasNext() {
			while (hasNextByte() && !isPrintableChar(buffer[ptr]))
				ptr++;
			return hasNextByte();
		}

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

		public long nextLong() {
			if (!hasNext())
				throw new NoSuchElementException();
			long n = 0;
			boolean minus = false;
			int b = readByte();
			if (b == '-') {
				minus = true;
				b = readByte();
			}
			if (b < '0' || '9' < b) {
				throw new NumberFormatException();
			}
			while (true) {
				if ('0' <= b && b <= '9') {
					n *= 10;
					n += b - '0';
				} else if (b == -1 || !isPrintableChar(b)) {
					return minus ? -n : n;
				} else {
					throw new NumberFormatException();
				}
				b = readByte();
			}
		}

		public int nextInt() {
			long nl = nextLong();
			if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)
				throw new NumberFormatException();
			return (int) nl;
		}

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