結果
問題 | No.723 2つの数の和 |
ユーザー | holeguma |
提出日時 | 2019-07-17 21:00:39 |
言語 | Java21 (openjdk 21) |
結果 |
RE
|
実行時間 | - |
コード長 | 3,359 bytes |
コンパイル時間 | 2,117 ms |
コンパイル使用メモリ | 78,552 KB |
実行使用メモリ | 39,496 KB |
最終ジャッジ日時 | 2024-06-02 10:59:11 |
合計ジャッジ時間 | 4,724 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 | 46 ms
36,864 KB |
testcase_01 | AC | 44 ms
37,100 KB |
testcase_02 | AC | 44 ms
37,108 KB |
testcase_03 | AC | 76 ms
39,232 KB |
testcase_04 | RE | - |
testcase_05 | RE | - |
testcase_06 | AC | 94 ms
39,268 KB |
testcase_07 | AC | 77 ms
38,792 KB |
testcase_08 | AC | 83 ms
38,864 KB |
testcase_09 | AC | 92 ms
39,176 KB |
testcase_10 | RE | - |
testcase_11 | AC | 55 ms
37,420 KB |
testcase_12 | AC | 79 ms
38,880 KB |
testcase_13 | AC | 44 ms
37,284 KB |
testcase_14 | AC | 46 ms
37,036 KB |
testcase_15 | AC | 47 ms
37,296 KB |
testcase_16 | AC | 47 ms
37,264 KB |
testcase_17 | AC | 47 ms
37,320 KB |
testcase_18 | WA | - |
testcase_19 | RE | - |
testcase_20 | AC | 46 ms
37,188 KB |
testcase_21 | AC | 47 ms
37,280 KB |
testcase_22 | AC | 46 ms
37,036 KB |
testcase_23 | RE | - |
testcase_24 | RE | - |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.InputMismatchException; import java.util.NoSuchElementException; public class Main { static PrintWriter out; static InputReader ir; static void solve() { int n = ir.nextInt(); int x = ir.nextInt(); int[] ct = new int[100001]; if (x > 200000) { out.println(0); return; } int[] a = ir.nextIntArray(n); for (int i : a) ct[i]++; long res = 0; for (int i = 0; i <= x; i++) { if (x - i <= 100000) res += ct[x - i] * ct[i]; } out.println(res); } public static void main(String[] args) { ir = new InputReader(System.in); out = new PrintWriter(System.out); solve(); out.flush(); } static class InputReader { private InputStream in; private byte[] buffer = new byte[1024]; private int curbuf; private int lenbuf; public InputReader(InputStream in) { this.in = in; this.curbuf = this.lenbuf = 0; } public boolean hasNextByte() { if (curbuf >= lenbuf) { curbuf = 0; try { lenbuf = in.read(buffer); } catch (IOException e) { throw new InputMismatchException(); } if (lenbuf <= 0) return false; } return true; } private int readByte() { if (hasNextByte()) return buffer[curbuf++]; else return -1; } private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); } private void skip() { while (hasNextByte() && isSpaceChar(buffer[curbuf])) curbuf++; } public boolean hasNext() { skip(); return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (!isSpaceChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public int nextInt() { if (!hasNext()) throw new NoSuchElementException(); int c = readByte(); while (isSpaceChar(c)) c = readByte(); boolean minus = false; if (c == '-') { minus = true; c = readByte(); } int res = 0; do { if (c < '0' || c > '9') throw new InputMismatchException(); res = res * 10 + c - '0'; c = readByte(); } while (!isSpaceChar(c)); return (minus) ? -res : res; } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); int c = readByte(); while (isSpaceChar(c)) c = readByte(); boolean minus = false; if (c == '-') { minus = true; c = readByte(); } long res = 0; do { if (c < '0' || c > '9') throw new InputMismatchException(); res = res * 10 + c - '0'; c = readByte(); } while (!isSpaceChar(c)); return (minus) ? -res : res; } public double nextDouble() { return Double.parseDouble(next()); } public int[] nextIntArray(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = nextInt(); 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 char[][] nextCharMap(int n, int m) { char[][] map = new char[n][m]; for (int i = 0; i < n; i++) map[i] = next().toCharArray(); return map; } } static void tr(Object... o) { out.println(Arrays.deepToString(o)); } }