結果
問題 | No.723 2つの数の和 |
ユーザー | Grenache |
提出日時 | 2018-09-17 09:30:12 |
言語 | Java19 (openjdk 21) |
結果 |
AC
|
実行時間 | 143 ms / 2,000 ms |
コード長 | 4,297 bytes |
コンパイル時間 | 3,895 ms |
コンパイル使用メモリ | 75,004 KB |
実行使用メモリ | 53,392 KB |
最終ジャッジ日時 | 2023-09-25 09:16:56 |
合計ジャッジ時間 | 7,169 ms |
ジャッジサーバーID (参考情報) |
judge12 / judge11 |
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 | 46 ms
49,468 KB |
testcase_01 | AC | 46 ms
49,688 KB |
testcase_02 | AC | 46 ms
49,336 KB |
testcase_03 | AC | 117 ms
52,968 KB |
testcase_04 | AC | 137 ms
53,392 KB |
testcase_05 | AC | 129 ms
53,300 KB |
testcase_06 | AC | 135 ms
53,196 KB |
testcase_07 | AC | 107 ms
52,988 KB |
testcase_08 | AC | 111 ms
53,088 KB |
testcase_09 | AC | 140 ms
52,828 KB |
testcase_10 | AC | 103 ms
53,024 KB |
testcase_11 | AC | 87 ms
51,428 KB |
testcase_12 | AC | 112 ms
53,020 KB |
testcase_13 | AC | 124 ms
53,084 KB |
testcase_14 | AC | 95 ms
53,084 KB |
testcase_15 | AC | 106 ms
52,872 KB |
testcase_16 | AC | 107 ms
52,788 KB |
testcase_17 | AC | 132 ms
52,984 KB |
testcase_18 | AC | 100 ms
52,744 KB |
testcase_19 | AC | 143 ms
52,484 KB |
testcase_20 | AC | 46 ms
49,352 KB |
testcase_21 | AC | 45 ms
47,412 KB |
testcase_22 | AC | 46 ms
49,432 KB |
testcase_23 | AC | 130 ms
53,056 KB |
testcase_24 | AC | 100 ms
53,028 KB |
ソースコード
import java.io.*; import java.util.*; public class Main_yukicoder723 { private static Scanner sc; private static Printer pr; private static void solve() { int n = sc.nextInt(); int x = sc.nextInt(); int[] cnt = new int[100_000 + 1]; for (int i = 0; i < n; i++) { int a = sc.nextInt(); cnt[a]++; } long ans = 0; for (int i = 0; i <= 100_000; i++) { if (x - i >= 0 && x - i <= 100_000) { ans += (long)cnt[i] * cnt[x - i]; } } pr.println(ans); } // --------------------------------------------------- public static void main(String[] args) { sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes())); pr = new Printer(System.out); solve(); // pr.close(); pr.flush(); // sc.close(); } static String INPUT = null; @SuppressWarnings("unused") private static class Scanner { BufferedReader br; Scanner (InputStream in) { br = new BufferedReader(new InputStreamReader(in)); } private boolean isPrintable(int ch) { return ch >= '!' && ch <= '~'; } private boolean isCRLF(int ch) { return ch == '\n' || ch == '\r' || ch == -1; } private int nextPrintable() { try { int ch; while (!isPrintable(ch = br.read())) { if (ch == -1) { throw new NoSuchElementException(); } } return ch; } catch (IOException e) { throw new NoSuchElementException(); } } String next() { try { int ch = nextPrintable(); StringBuilder sb = new StringBuilder(); do { sb.appendCodePoint(ch); } while (isPrintable(ch = br.read())); return sb.toString(); } catch (IOException e) { throw new NoSuchElementException(); } } int nextInt() { try { // parseInt from Integer.parseInt() boolean negative = false; int res = 0; int limit = -Integer.MAX_VALUE; int radix = 10; int fc = nextPrintable(); if (fc < '0') { if (fc == '-') { negative = true; limit = Integer.MIN_VALUE; } else if (fc != '+') { throw new NumberFormatException(); } fc = br.read(); } int multmin = limit / radix; int ch = fc; do { int digit = ch - '0'; if (digit < 0 || digit >= radix) { throw new NumberFormatException(); } if (res < multmin) { throw new NumberFormatException(); } res *= radix; if (res < limit + digit) { throw new NumberFormatException(); } res -= digit; } while (isPrintable(ch = br.read())); return negative ? res : -res; } catch (IOException e) { throw new NoSuchElementException(); } } long nextLong() { try { // parseLong from Long.parseLong() boolean negative = false; long res = 0; long limit = -Long.MAX_VALUE; int radix = 10; int fc = nextPrintable(); if (fc < '0') { if (fc == '-') { negative = true; limit = Long.MIN_VALUE; } else if (fc != '+') { throw new NumberFormatException(); } fc = br.read(); } long multmin = limit / radix; int ch = fc; do { int digit = ch - '0'; if (digit < 0 || digit >= radix) { throw new NumberFormatException(); } if (res < multmin) { throw new NumberFormatException(); } res *= radix; if (res < limit + digit) { throw new NumberFormatException(); } res -= digit; } while (isPrintable(ch = br.read())); return negative ? res : -res; } catch (IOException e) { throw new NoSuchElementException(); } } float nextFloat() { return Float.parseFloat(next()); } double nextDouble() { return Double.parseDouble(next()); } String nextLine() { try { int ch; while (isCRLF(ch = br.read())) { if (ch == -1) { throw new NoSuchElementException(); } } StringBuilder sb = new StringBuilder(); do { sb.appendCodePoint(ch); } while (!isCRLF(ch = br.read())); return sb.toString(); } catch (IOException e) { throw new NoSuchElementException(); } } void close() { try { br.close(); } catch (IOException e) { // throw new NoSuchElementException(); } } } private static class Printer extends PrintWriter { Printer(OutputStream out) { super(out); } } }