Submission #18262168


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import java.io.*;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.StringTokenizer;
public class Main {
// Arrays.sort()
// Math.pow
// int
static class Task {
public void solve(int testNumber, InputReader in, PrintWriter out) {
long s = in.nextLong();
long p = in.nextLong();
BigInteger bigS = new BigInteger(String.valueOf(s));
BigInteger bigP = new BigInteger(String.valueOf(p));
BigInteger tmp = bigS.multiply(bigS).subtract(bigP.multiply(new BigInteger("4"))); // b^2 - 4ac
 
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import java.io.*;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main {

    // 注意不要用Arrays.sort()
    // 注意Math.pow可能导致精度问题
    // 注意int溢出问题
    static class Task {

        public void solve(int testNumber, InputReader in, PrintWriter out) {
            long s = in.nextLong();
            long p = in.nextLong();

            BigInteger bigS = new BigInteger(String.valueOf(s));
            BigInteger bigP = new BigInteger(String.valueOf(p));

            BigInteger tmp = bigS.multiply(bigS).subtract(bigP.multiply(new BigInteger("4"))); // b^2 - 4ac

            BigInteger bigDelta = tmp.sqrt();
            if (!bigDelta.multiply(bigDelta).equals(tmp)) {
                out.println("No");
                return;
            }

            long delta = Long.parseLong(String.valueOf(bigDelta));
            out.println(((s + delta) % 2 == 0 && (s - delta) % 2 == 0 && s - delta > 0) ? "Yes" : "No");
        }
    }

    private static void sort(double[] arr) {
        Double[] objArr = Arrays.stream(arr).boxed().toArray(Double[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void sortDesc(double[] arr) {
        Double[] objArr = Arrays.stream(arr).boxed().toArray(Double[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[arr.length - i - 1];
        }
    }

    private static void sort(int[] arr) {
        Integer[] objArr = Arrays.stream(arr).boxed().toArray(Integer[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void sortDesc(int[] arr) {
        Integer[] objArr = Arrays.stream(arr).boxed().toArray(Integer[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[arr.length - i - 1];
        }
    }

    private static void sort(long[] arr) {
        Long[] objArr = Arrays.stream(arr).boxed().toArray(Long[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void sortDesc(long[] arr) {
        Long[] objArr = Arrays.stream(arr).boxed().toArray(Long[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[arr.length - i - 1];
        }
    }

    private static void solve() {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task task = new Task();
        task.solve(1, in, out);
        out.close();
    }

    public static void main(String[] args) {
        new Thread(null, () -> solve(), "1", 1 << 26).start();
    }

    static class InputReader {

        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

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

    }

}

Submission Info

Submission Time
Task A - Sum and Product
User yuruiyin
Language Java (OpenJDK 11.0.6)
Score 300
Code Size 4061 Byte
Status AC
Exec Time 91 ms
Memory 34304 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 2
AC × 14
Set Name Test Cases
Sample sample_01.txt, sample_02.txt
All random_01.txt, random_02.txt, random_03.txt, random_04.txt, random_05.txt, random_06.txt, random_07.txt, random_08.txt, random_09.txt, random_10.txt, random_11.txt, random_12.txt, sample_01.txt, sample_02.txt
Case Name Status Exec Time Memory
random_01.txt AC 91 ms 34076 KB
random_02.txt AC 86 ms 34244 KB
random_03.txt AC 82 ms 34304 KB
random_04.txt AC 76 ms 33992 KB
random_05.txt AC 82 ms 33988 KB
random_06.txt AC 77 ms 33804 KB
random_07.txt AC 85 ms 34256 KB
random_08.txt AC 78 ms 34080 KB
random_09.txt AC 83 ms 34096 KB
random_10.txt AC 81 ms 34084 KB
random_11.txt AC 82 ms 34000 KB
random_12.txt AC 80 ms 34100 KB
sample_01.txt AC 77 ms 33788 KB
sample_02.txt AC 87 ms 34244 KB


2025-02-28 (Fri)
05:05:35 +00:00