Submission #18874890


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import java.io.*;
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) {
int n = in.nextInt();
long[] arr = new long[n];
for (int i = 0; i < n; i++) {
arr[i] = in.nextInt();
}
sort(arr);
long[] sufSumArr = new long[n];
sufSumArr[n - 1] = arr[n - 1];
 
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import java.io.*;
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) {
            int n = in.nextInt();
            long[] arr = new long[n];
            for (int i = 0; i < n; i++) {
                arr[i] = in.nextInt();
            }

            sort(arr);
            long[] sufSumArr = new long[n];
            sufSumArr[n - 1] = arr[n - 1];
            for (int i = n - 2; i >= 0; i--) {
                sufSumArr[i] = sufSumArr[i + 1] + arr[i];
            }

            long sum = 0;
            for (int i = 0; i < n; i++) {
                sum += sufSumArr[i] - arr[i] * (n - i);
            }

            out.println(sum);
        }
    }

    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 D - Sum of difference
User yuruiyin
Language Java (OpenJDK 11.0.6)
Score 400
Code Size 3936 Byte
Status AC
Exec Time 605 ms
Memory 59692 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 2
AC × 25
Set Name Test Cases
Sample sample_01.txt, sample_02.txt
All hand_01.txt, max_01.txt, max_02.txt, 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, random_13.txt, random_14.txt, random_15.txt, random_16.txt, random_17.txt, random_18.txt, random_19.txt, random_20.txt, sample_01.txt, sample_02.txt
Case Name Status Exec Time Memory
hand_01.txt AC 91 ms 34536 KB
max_01.txt AC 401 ms 58028 KB
max_02.txt AC 281 ms 58492 KB
random_01.txt AC 505 ms 59040 KB
random_02.txt AC 526 ms 58292 KB
random_03.txt AC 517 ms 59672 KB
random_04.txt AC 605 ms 58336 KB
random_05.txt AC 516 ms 58388 KB
random_06.txt AC 527 ms 58284 KB
random_07.txt AC 557 ms 58484 KB
random_08.txt AC 559 ms 58232 KB
random_09.txt AC 548 ms 58484 KB
random_10.txt AC 535 ms 58184 KB
random_11.txt AC 587 ms 59276 KB
random_12.txt AC 558 ms 58064 KB
random_13.txt AC 582 ms 58592 KB
random_14.txt AC 570 ms 58560 KB
random_15.txt AC 526 ms 58400 KB
random_16.txt AC 498 ms 59408 KB
random_17.txt AC 520 ms 59692 KB
random_18.txt AC 479 ms 58284 KB
random_19.txt AC 489 ms 57788 KB
random_20.txt AC 537 ms 58204 KB
sample_01.txt AC 75 ms 34188 KB
sample_02.txt AC 83 ms 34440 KB


2025-02-28 (Fri)
05:18:26 +00:00