結果

問題 No.1765 While Shining
ユーザー cyclerecycle9cyclerecycle9
提出日時 2021-12-07 05:54:28
言語 Java21
(openjdk 21)
結果
AC  
実行時間 102 ms / 2,000 ms
コード長 3,973 bytes
コンパイル時間 1,886 ms
コンパイル使用メモリ 80,456 KB
実行使用メモリ 40,876 KB
最終ジャッジ日時 2024-07-07 10:17:09
合計ジャッジ時間 4,603 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
このコードへのチャレンジ
（要ログイン）

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 44 ms
37,152 KB
testcase_01 AC 45 ms
36,880 KB
testcase_02 AC 45 ms
37,240 KB
testcase_03 AC 43 ms
36,840 KB
testcase_04 AC 42 ms
37,280 KB
testcase_05 AC 42 ms
36,640 KB
testcase_06 AC 41 ms
36,776 KB
testcase_07 AC 42 ms
37,188 KB
testcase_08 AC 42 ms
37,232 KB
testcase_09 AC 86 ms
39,424 KB
testcase_10 AC 87 ms
40,644 KB
testcase_11 AC 96 ms
40,268 KB
testcase_12 AC 93 ms
40,464 KB
testcase_13 AC 89 ms
40,340 KB
testcase_14 AC 102 ms
40,328 KB
testcase_15 AC 98 ms
40,464 KB
testcase_16 AC 98 ms
40,576 KB
testcase_17 AC 88 ms
40,560 KB
testcase_18 AC 97 ms
40,448 KB
testcase_19 AC 97 ms
40,416 KB
testcase_20 AC 89 ms
40,448 KB
testcase_21 AC 96 ms
40,492 KB
testcase_22 AC 99 ms
40,784 KB
testcase_23 AC 97 ms
40,352 KB
testcase_24 AC 98 ms
40,876 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.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.*;
import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;
import java.beans.Visibility;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.UncheckedIOException;
import java.lang.Thread.State;
import java.lang.reflect.Field;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.StandardCharsets;

public class Main {
	static final long MOD1=1000000007;
	static final long MOD=998244353;
	static long ans=0;
	public static void main(String[] args){
		PrintWriter out = new PrintWriter(System.out);
		InputReader sc=new InputReader(System.in);
		int n = sc.nextInt();
		int[] A = sc.nextIntArray(n);
		for (int i = 0; i < A.length; i+=2) {
			A[i] ^= 1;
		}
		int[] sum = new int[n];
		for (int i = n-2; i >= 0; i--) {
			if (A[i]==A[i+1]){
				sum[i] = sum[i+1] + 1;
			}else {
				sum[i] = 1;
			}
		}
		long ans = 0;
		for (int i = 0; i < n; i++){
			if(i%2==0)A[i]^=1;
			if (A[i]==1){
				ans += sum[i];
			}
		}
		System.out.println(ans);
   	}
	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 double[] nextDoubleArray(int n) {
			double[] a = new double[n];
			for (int i = 0; i < n; i++)
				a[i] = nextDouble();
			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;
		}
	}
}
0