結果
問題 | No.4 おもりと天秤 |
ユーザー | wdkkou |
提出日時 | 2019-08-03 19:34:19 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,229 bytes |
コンパイル時間 | 1,964 ms |
コンパイル使用メモリ | 77,324 KB |
実行使用メモリ | 38,940 KB |
最終ジャッジ日時 | 2024-07-06 04:44:46 |
合計ジャッジ時間 | 4,122 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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 | 45 ms
36,632 KB |
testcase_01 | AC | 45 ms
36,548 KB |
testcase_02 | AC | 44 ms
36,840 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | AC | 43 ms
36,700 KB |
testcase_07 | WA | - |
testcase_08 | AC | 44 ms
36,640 KB |
testcase_09 | AC | 65 ms
38,940 KB |
testcase_10 | WA | - |
testcase_11 | AC | 43 ms
36,504 KB |
testcase_12 | AC | 43 ms
36,504 KB |
testcase_13 | AC | 42 ms
36,676 KB |
testcase_14 | AC | 41 ms
36,764 KB |
testcase_15 | AC | 43 ms
36,916 KB |
testcase_16 | WA | - |
testcase_17 | AC | 43 ms
36,764 KB |
testcase_18 | AC | 71 ms
38,144 KB |
testcase_19 | AC | 70 ms
37,752 KB |
testcase_20 | AC | 60 ms
37,348 KB |
testcase_21 | AC | 70 ms
37,792 KB |
testcase_22 | WA | - |
ソースコード
import java.util.*; import java.io.*; public class Main { public static void main(String[] args) { FastScanner sc = new FastScanner(); int n = sc.nextInt(); int[] w = new int[n]; int wtotal = 0; for (int i = 0; i < n; i++) { w[i] = sc.nextInt(); wtotal += w[i]; } if (wtotal % 2 == 1) { System.out.println("impossible"); return; } boolean[][] dp = new boolean[n + 1][wtotal + 1]; dp[0][0] = true; for (int i = 1; i <= n; i++) { for (int j = 0; j <= wtotal; j++) { if (j - w[i - 1] >= 0) { dp[i][j] = dp[i - 1][j - w[i - 1]]; } else { dp[i][j] = dp[i - 1][j]; } } } if (dp[n][wtotal / 2]) { System.out.println("possible"); return; } System.out.println("impossible"); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } public boolean hasNext() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next()); } }