結果
問題 | No.4 おもりと天秤 |
ユーザー | Cavasiro |
提出日時 | 2020-05-03 18:32:34 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 75 ms / 5,000 ms |
コード長 | 4,061 bytes |
コンパイル時間 | 2,260 ms |
コンパイル使用メモリ | 80,504 KB |
実行使用メモリ | 54,036 KB |
最終ジャッジ日時 | 2024-06-13 04:04:52 |
合計ジャッジ時間 | 4,803 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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 | 62 ms
51,148 KB |
testcase_01 | AC | 61 ms
50,948 KB |
testcase_02 | AC | 63 ms
53,088 KB |
testcase_03 | AC | 63 ms
51,036 KB |
testcase_04 | AC | 64 ms
51,192 KB |
testcase_05 | AC | 72 ms
51,940 KB |
testcase_06 | AC | 63 ms
51,160 KB |
testcase_07 | AC | 75 ms
53,860 KB |
testcase_08 | AC | 63 ms
50,788 KB |
testcase_09 | AC | 74 ms
51,944 KB |
testcase_10 | AC | 72 ms
54,036 KB |
testcase_11 | AC | 61 ms
50,920 KB |
testcase_12 | AC | 61 ms
51,124 KB |
testcase_13 | AC | 60 ms
50,960 KB |
testcase_14 | AC | 60 ms
53,060 KB |
testcase_15 | AC | 61 ms
50,668 KB |
testcase_16 | AC | 61 ms
50,616 KB |
testcase_17 | AC | 60 ms
50,924 KB |
testcase_18 | AC | 71 ms
53,800 KB |
testcase_19 | AC | 73 ms
52,080 KB |
testcase_20 | AC | 73 ms
51,836 KB |
testcase_21 | AC | 73 ms
52,044 KB |
testcase_22 | AC | 71 ms
51,836 KB |
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.NoSuchElementException; class Main implements Runnable { private final FastScanner sc; private final PrintWriter out; //private final long MOD = 1000000007; //private final int[] d8x = {-1,0,1,1,1,0,-1,-1}; //private final int[] d8y = {-1,-1,-1,0,1,1,1,0}; //private final int[] d4x = {0,1,0,-1}; //private final int[] d4y = {-1,0,1,0}; int n; int[] w; public static void main(String[] args) { new Thread(null, new Main(), "", 16L * 1024 * 1024).start(); } Main() { sc = new FastScanner(); out = new PrintWriter(System.out); } private void init() throws Exception { n = sc.nextInt(); w = new int[n]; for(int i=0;i<n;i++){ w[i] = sc.nextInt(); } } private void solve() throws Exception{ boolean[][] dp; int sum = Arrays.stream(w).sum(); dp = new boolean[n+1][sum+1]; dp[0][0] = true; for(int i=1;i<=n;i++){ for(int j=0;j<=sum;j++){ if(dp[i-1][j] || (j-w[i-1]>=0 && dp[i-1][j-w[i-1]])){ dp[i][j] = true; } } } if(sum%2==0 && dp[n][sum/2]){ out.println("possible"); } else { out.println("impossible"); } } public void run() { try { init(); sc.close(); solve(); } catch (Exception e) { e.printStackTrace(); System.exit(1); } out.flush(); out.close(); } } class Data { } class ExIntVector { private int[] a; private int cnt; public ExIntVector(int max){ a = new int[max]; cnt = 0; } public int size(){ return cnt; } public void add(int x){ a[cnt++] = x; } public int get(int i){ return a[i]; } public int getLast(){ return a[cnt-1]; } public int[] toArray(){ return a; } } 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 read() { 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 boolean hasNext() { while (read() && !isVisibleChar(buffer[ptr])) ptr++; return read(); } private int getNextChar() { if (read()) { ptr++; return buffer[ptr - 1]; } else { return -1; } } private static boolean isVisibleChar(int code) { return code >= 33 && code <= 126; } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = getNextChar(); while (isVisibleChar(b)) { sb.appendCodePoint(b); b = getNextChar(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean sign = true; int b = getNextChar(); if (b == '-') { sign = false; b = getNextChar(); } if (b < '0' || b > '9') { throw new NumberFormatException(); } while (true) { if (b >= '0' && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isVisibleChar(b)) { return sign ? n : -n; } else { throw new NumberFormatException(); } b = getNextChar(); } } public int nextInt() { long n = nextLong(); if (n < Integer.MIN_VALUE || n > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) n; } public double nextDouble() { return Double.parseDouble(next()); } public char nextChar() { if (!hasNext()) throw new NoSuchElementException(); int b = getNextChar(); while (!isVisibleChar(b)) { b = getNextChar(); } return (char) b; } public void close() { try { in.close(); } catch (IOException e) { e.printStackTrace(); } } } class IntQueue { protected int[] a; protected int head, tail; public IntQueue(int max) { a = new int[max]; } public void offer(int x) { a[tail++] = x; } public int poll() { return a[head++]; } public int peek() { return a[head]; } public int size() { return tail - head; } }