結果
問題 | No.4 おもりと天秤 |
ユーザー |
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提出日時 | 2015-02-21 03:14:55 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 76 ms / 5,000 ms |
コード長 | 2,837 bytes |
コンパイル時間 | 2,665 ms |
コンパイル使用メモリ | 79,912 KB |
実行使用メモリ | 38,100 KB |
最終ジャッジ日時 | 2024-06-26 09:08:08 |
合計ジャッジ時間 | 4,946 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
other | AC * 23 |
ソースコード
import java.awt.Point; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.Comparator; import java.util.LinkedList; import java.util.List; import java.util.Queue; public class Main { // public static final int INF = 1 << 30; public static int[] dp; public static int n; public static void main(String[] args) throws NumberFormatException, IOException{ ContestScanner in = new ContestScanner(); n = in.nextInt(); int max = n*100; dp = new int[max+1]; // for(int i=0; i<=n; i++){ // dp[i] = INF; // } dp[0] = 1; int sum = 0; for(int i=0; i<n; i++){ int w = in.nextInt(); sum += w; for(int j=max; j>=0; j--){ if(dp[j] > 0 && j+w <= max) dp[j+w] = 1; } } if(sum%2 == 1 || dp[sum/2] == 0) System.out.println("impossible"); else System.out.println("possible"); } public static void dfs(int pos, int turn){ int bit = Integer.bitCount(pos); int nxt = pos + bit; if(0 < nxt && nxt <= n){ if(dp[nxt] > turn+1){ dp[nxt] = turn+1; dfs(nxt, turn+1); } } nxt = pos - bit; if(0 < nxt && nxt <= n){ if(dp[nxt] > turn+1){ dp[nxt] = turn+1; dfs(nxt, turn+1); } } } } class Pair{ int cost; int time; public Pair(int cost, int time){ this.cost = cost; this.time = time; } } class MyComp implements Comparator<int[]>{ public int compare(int[] a, int[] b) { return a[0] - b[0]; } } class Reverse implements Comparator<Integer>{ public int compare(Integer arg0, Integer arg1) { return arg1 - arg0; } } class Node{ int color; boolean checked; List<Integer> to = new ArrayList<Integer>(); public Node(){ checked = false; } } //class Node{ // int id; // List<Node> edge = new ArrayList<Node>(); // public Node(int id){ // this.id = id; // } // public void createEdge(Node node){ // edge.add(node); // } //} class ContestScanner{ private BufferedReader reader; private String[] line; private int idx; public ContestScanner() throws FileNotFoundException{ reader = new BufferedReader(new InputStreamReader(System.in)); } public ContestScanner(String filename) throws FileNotFoundException{ reader = new BufferedReader(new InputStreamReader(new FileInputStream(filename))); } public String nextToken() throws IOException{ if(line == null || line.length <= idx){ line = reader.readLine().trim().split(" "); idx = 0; } return line[idx++]; } public long nextLong() throws IOException, NumberFormatException{ return Long.parseLong(nextToken()); } public int nextInt() throws NumberFormatException, IOException{ return (int)nextLong(); } public double nextDouble() throws NumberFormatException, IOException{ return Double.parseDouble(nextToken()); } }