結果

問題 No.1514 Squared Matching
ユーザー cyclerecycle9cyclerecycle9
提出日時 2021-07-28 23:21:42
言語 Java21
(openjdk 21)
結果
AC  
実行時間 1,461 ms / 4,000 ms
コード長 4,329 bytes
コンパイル時間 4,662 ms
コンパイル使用メモリ 79,992 KB
実行使用メモリ 251,300 KB
最終ジャッジ日時 2023-10-11 21:18:58
合計ジャッジ時間 28,989 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 56 ms
50,004 KB
testcase_01 AC 1,461 ms
250,944 KB
testcase_02 AC 56 ms
49,816 KB
testcase_03 AC 56 ms
49,976 KB
testcase_04 AC 56 ms
49,796 KB
testcase_05 AC 58 ms
49,964 KB
testcase_06 AC 106 ms
54,268 KB
testcase_07 AC 336 ms
92,568 KB
testcase_08 AC 1,347 ms
242,996 KB
testcase_09 AC 1,179 ms
220,036 KB
testcase_10 AC 1,287 ms
235,364 KB
testcase_11 AC 1,313 ms
241,220 KB
testcase_12 AC 1,370 ms
246,248 KB
testcase_13 AC 1,393 ms
248,824 KB
testcase_14 AC 1,396 ms
250,552 KB
testcase_15 AC 1,378 ms
250,056 KB
testcase_16 AC 1,407 ms
251,140 KB
testcase_17 AC 1,375 ms
251,076 KB
testcase_18 AC 1,374 ms
250,756 KB
testcase_19 AC 1,378 ms
251,300 KB
testcase_20 AC 1,380 ms
250,232 KB
testcase_21 AC 1,381 ms
251,288 KB
testcase_22 AC 350 ms
94,604 KB
testcase_23 AC 622 ms
130,788 KB
testcase_24 AC 861 ms
172,148 KB
testcase_25 AC 1,106 ms
211,580 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.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.UncheckedIOException;
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 MOD=1000000007;
	static final long MOD1=998244353;
	static int 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[] dp = new int[(int) (Math.sqrt(N)+100)];
		ArrayList<Integer> p = new ArrayList<>();
		for (int i = 2; i*i <= N; i++) {
			if(dp[i]!=0)continue;
			p.add(i);
			for (int j = i; j < dp.length; j+=i) {
				if(dp[j]!=0)continue;
				dp[j] = i;
			}
		}
		int[] prime = new int[p.size()];
		Arrays.setAll(prime, i->p.get(i));
		int[] X = new int[N+1];
		Arrays.setAll(X, i->i);
		long ans = 0;
		for (int i = 0; i < prime.length; i++) {
			int p_sq = prime[i]*prime[i];
			for (int j = p_sq; j <= N; j+=p_sq) {
				while (X[j]%(p_sq)==0) {
					X[j]/=p_sq;
				}
			}
		}
		for (int i = 1; i <= N; i++) {
			//System.out.println(X[i]);
			int c = (int) Math.sqrt(N/X[i]);
			for (int j = Math.max(1, c-1); j <= c+1; j++) {
				if(X[i]*j*j > N) {
					//System.out.println(i+" "+m+" "+j);
					ans += j - 1;
					break;
				}
			}
		}
		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;
		}
	}
}
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