結果

問題 No.1470 Mex Sum
ユーザー neko_the_shadowneko_the_shadow
提出日時 2021-04-13 10:28:22
言語 Java21
(openjdk 21)
結果
AC  
実行時間 343 ms / 2,000 ms
コード長 5,133 bytes
コンパイル時間 2,329 ms
コンパイル使用メモリ 92,268 KB
実行使用メモリ 70,524 KB
最終ジャッジ日時 2023-09-11 14:57:26
合計ジャッジ時間 18,320 ms
ジャッジサーバーID
（参考情報） 		judge12 / judge15
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
50,684 KB
testcase_01 AC 59 ms
50,676 KB
testcase_02 AC 134 ms
56,900 KB
testcase_03 AC 128 ms
56,956 KB
testcase_04 AC 131 ms
57,028 KB
testcase_05 AC 128 ms
56,824 KB
testcase_06 AC 127 ms
57,044 KB
testcase_07 AC 128 ms
56,724 KB
testcase_08 AC 128 ms
57,068 KB
testcase_09 AC 131 ms
56,712 KB
testcase_10 AC 118 ms
57,020 KB
testcase_11 AC 129 ms
55,388 KB
testcase_12 AC 333 ms
68,700 KB
testcase_13 AC 325 ms
68,048 KB
testcase_14 AC 316 ms
68,144 KB
testcase_15 AC 328 ms
68,700 KB
testcase_16 AC 321 ms
68,204 KB
testcase_17 AC 343 ms
68,904 KB
testcase_18 AC 324 ms
68,464 KB
testcase_19 AC 321 ms
68,744 KB
testcase_20 AC 323 ms
68,572 KB
testcase_21 AC 334 ms
68,128 KB
testcase_22 AC 332 ms
69,108 KB
testcase_23 AC 333 ms
68,780 KB
testcase_24 AC 332 ms
68,376 KB
testcase_25 AC 330 ms
68,488 KB
testcase_26 AC 330 ms
68,260 KB
testcase_27 AC 323 ms
68,760 KB
testcase_28 AC 328 ms
68,896 KB
testcase_29 AC 327 ms
68,608 KB
testcase_30 AC 325 ms
68,584 KB
testcase_31 AC 313 ms
68,780 KB
testcase_32 AC 327 ms
68,932 KB
testcase_33 AC 324 ms
68,152 KB
testcase_34 AC 330 ms
68,272 KB
testcase_35 AC 327 ms
68,640 KB
testcase_36 AC 322 ms
68,360 KB
testcase_37 AC 301 ms
69,652 KB
testcase_38 AC 309 ms
69,820 KB
testcase_39 AC 308 ms
70,524 KB
testcase_40 AC 315 ms
70,020 KB
testcase_41 AC 322 ms
69,556 KB
testcase_42 AC 310 ms
70,276 KB
testcase_43 AC 313 ms
69,572 KB
testcase_44 AC 320 ms
69,772 KB
testcase_45 AC 317 ms
69,884 KB
testcase_46 AC 325 ms
70,228 KB
testcase_47 AC 321 ms
69,864 KB
testcase_48 AC 307 ms
69,528 KB
testcase_49 AC 311 ms
70,012 KB
testcase_50 AC 323 ms
69,744 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 # 

package _1470;
import java.io.BufferedReader;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.UncheckedIOException;
import java.math.BigInteger;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.List;
import java.util.function.Supplier;
import java.util.regex.Pattern;

public class Main {
    public void exec() {
        int n = stdin.nextInt();
        long[] a = stdin.nextLongArray(n);
        
        long one = 0;
        long two = 0;
        long up2 = 0;
        long up3 = 0;
        for (int i = 0; i < n; i++) {
            if (a[i]==1) one++;
            if (a[i]==2) two++;
            if (a[i]>=2) up2++;
            if (a[i]>=3) up3++;
        }
        
        long ans = 0;
        for (int i = 0; i < n; i++) {
            if (a[i]==1) one--;
            if (a[i]==2) two--;
            if (a[i]>=2) up2--;
            if (a[i]>=3) up3--;
            
            if (a[i]==1) {
                ans += 2*(one+up3) + 3*two;
            } else if (a[i]==2) {
                ans += 1*up2 + 3*one;
            } else {
                ans += 1*up2 + 2*one;
            }
        }
        stdout.println(ans);
    }
    

    private static final Stdin stdin = new Stdin(System.in);
    private static final Stdout stdout = new Stdout(System.out);

    public static void main(String[] args) {
        try {
            new Main().exec();
        } finally {
            stdout.flush();
        }
    }

    public static class Stdin {
        private Deque<String> queue;
        private BufferedReader in;
        private Pattern space;

        public Stdin(InputStream in) {
            this.queue = new ArrayDeque<>();
            this.in = new BufferedReader(new InputStreamReader(in));
            this.space = Pattern.compile(" ");
        }

        public String nextString() {
            if (queue.isEmpty()) {
                try {
                    String line = in.readLine();
                    if (line == null) {
                        throw new EOFException();
                    }
                    space.splitAsStream(line).forEach(this.queue::addLast);
                } catch (IOException e) {
                    throw new UncheckedIOException(e);
                }
            }
            return queue.removeFirst();
        }

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

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

        public long nextLong() {
            return Long.parseLong(nextString());
        }
        
        public BigInteger nextBigInteger() {
            return new BigInteger(nextString());
        }

        public String[] nextStringArray(int n) {
            String[] a = new String[n];
            for (int i = 0; i < n; i++) a[i] = nextString();
            return a;
        }

        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 BigInteger[] nexBigIntegerArray(int n) {
            BigInteger[] a = new BigInteger[n];
            for (int i = 0; i < n; i++) a[i] = nextBigInteger();
            return a;
        }
        
        public List<Integer> nextIntegerList(int n) {
            return nextList(n, this::nextInt);
        }
        
        public List<Long> nextLongList(int n) {
            return nextList(n, this::nextLong);
        }
        
        public List<Double> nextDoubleList(int n) {
            return nextList(n, this::nextDouble);
        }
        
        public List<String> nextStringList(int n) {
            return nextList(n, this::nextString);
        }
        
        public List<BigInteger> nextBigIntegerList(int n) {
            return nextList(n, this::nextBigInteger);
        }
        
        private <T> List<T> nextList(int n, Supplier<T> supplier) {
            List<T> a = new ArrayList<>();
            for (int i = 0; i < n; i++) a.add(supplier.get());
            return a;
        }
    }

    public static class Stdout {
        private PrintWriter stdout;

        public Stdout(PrintStream stdout) {
            this.stdout =  new PrintWriter(stdout, false);
        }

        public void println(Object ... objs) {
            for (int i = 0, len = objs.length; i < len; i++) {
                stdout.print(objs[i]);
                if (i != len-1) stdout.print(' ');
            }
            stdout.println();
        }

        public void flush() {
            stdout.flush();
        }
    }
}
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