結果

問題 No.871 かえるのうた
ユーザー kitakitalilykitakitalily
提出日時 2019-08-30 22:01:03
言語 Java21
(openjdk 21)
結果
WA  
実行時間 -
コード長 3,338 bytes
コンパイル時間 2,381 ms
コンパイル使用メモリ 77,468 KB
実行使用メモリ 41,252 KB
最終ジャッジ日時 2024-11-21 23:24:27
合計ジャッジ時間 9,108 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge5
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 55 ms
36,136 KB
testcase_01 AC 52 ms
36,580 KB
testcase_02 AC 54 ms
36,836 KB
testcase_03 AC 54 ms
36,392 KB
testcase_04 WA -
testcase_05 AC 53 ms
36,588 KB
testcase_06 WA -
testcase_07 AC 54 ms
36,608 KB
testcase_08 WA -
testcase_09 WA -
testcase_10 WA -
testcase_11 AC 58 ms
36,460 KB
testcase_12 WA -
testcase_13 WA -
testcase_14 AC 179 ms
41,252 KB
testcase_15 WA -
testcase_16 AC 205 ms
40,736 KB
testcase_17 AC 177 ms
40,536 KB
testcase_18 AC 104 ms
38,064 KB
testcase_19 WA -
testcase_20 AC 88 ms
37,608 KB
testcase_21 WA -
testcase_22 AC 54 ms
36,656 KB
testcase_23 AC 53 ms
36,588 KB
testcase_24 AC 53 ms
36,328 KB
testcase_25 WA -
testcase_26 WA -
testcase_27 WA -
testcase_28 AC 55 ms
36,708 KB
testcase_29 AC 122 ms
39,780 KB
testcase_30 WA -
testcase_31 AC 64 ms
36,468 KB
testcase_32 WA -
testcase_33 WA -
testcase_34 AC 104 ms
38,332 KB
testcase_35 WA -
testcase_36 AC 155 ms
40,748 KB
testcase_37 WA -
testcase_38 WA -
testcase_39 WA -
testcase_40 AC 129 ms
39,424 KB
testcase_41 AC 54 ms
36,616 KB
testcase_42 AC 133 ms
39,560 KB
testcase_43 WA -
testcase_44 WA -
testcase_45 AC 57 ms
36,608 KB
testcase_46 AC 55 ms
36,624 KB
testcase_47 AC 54 ms
36,452 KB
testcase_48 AC 54 ms
36,624 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

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

public class Main {
 	public static void main(String[] args){
		FastScanner scanner = new FastScanner();
		int n = scanner.nextInt();
		int k = scanner.nextInt()-1;
		long[] x = new long[n];
		long[] a = new long[n];
		for(int i = 0; i < n; i++){
			x[i] = scanner.nextLong();
		}
		for(int i = 0; i < n; i++){
			a[i] = scanner.nextLong();
		}
		int min = k;
		int max = k;
		for(int cnt = 0; cnt < n; cnt++){
			min = lowerBound(x,x[min]-a[min]);
			max = upperBound(x,x[max]+a[max])-1;
		}
		int mmin = min;
		int mmax = max;
		for(int i = min; i <= max; i++){
			mmin = Math.min(mmin, lowerBound(x,x[i]-a[i]));
			mmax = Math.max(mmax,upperBound(x,x[i]+a[i])-1);
			//System.out.println(mmin+ " " + mmax);
		}
		System.out.println(mmax-mmin+1);
	}
	public static int upperBound(long[] array, long value) {
			 int low = 0;
			 int high = array.length;
			 int mid;
			 while( low < high ) {
					 mid = ((high - low) >>> 1) + low; // (high + low) / 2
					 if( array[mid] <= value ) {
							 low = mid + 1;
					 } else {
							 high = mid;
					 }
			 }
			 return low;
	 }
	 public static final int lowerBound(final long[] arr, final long value) {
    	int low = 0;
    	int high = arr.length;
    	int mid;
    	while (low < high){
        	mid = ((high - low) >>> 1) + low;    //(low + high) / 2 (オーバーフロー対策)
        	if (arr[mid] < value) {
          	low = mid + 1;
        	} else {
            high = mid;
        	}
    	}
    	return low;
		}
	private static class FastScanner {
		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 static 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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