結果
問題 | No.1470 Mex Sum |
ユーザー |
![]() |
提出日時 | 2022-09-30 15:36:12 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 252 ms / 2,000 ms |
コード長 | 1,462 bytes |
コンパイル時間 | 2,377 ms |
コンパイル使用メモリ | 77,176 KB |
実行使用メモリ | 44,916 KB |
最終ジャッジ日時 | 2024-12-22 18:52:21 |
合計ジャッジ時間 | 14,211 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 49 |
ソースコード
import java.io.*;import java.util.*;public class Main {public static void main(String[] args) throws Exception {Scanner sc = new Scanner();long n = sc.nextInt();long one = 0;long two = 0;long three = 0;for (int i = 0; i < n; i++) {int x = sc.nextInt();if (x == 1) {one++;} else if (x == 2) {two++;} else {three++;}}long oneone = one * (one - 1) / 2 + one * three;long onetwo = one * two;long others = n * (n - 1) / 2 - oneone - onetwo;System.out.println(oneone * 2 + onetwo * 3 + others);}}class Scanner {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));StringTokenizer st = new StringTokenizer("");StringBuilder sb = new StringBuilder();public Scanner() throws Exception {}public int nextInt() throws Exception {return Integer.parseInt(next());}public long nextLong() throws Exception {return Long.parseLong(next());}public double nextDouble() throws Exception {return Double.parseDouble(next());}public String next() throws Exception {while (!st.hasMoreTokens()) {st = new StringTokenizer(br.readLine());}return st.nextToken();}}