結果
| 問題 |
No.4 おもりと天秤
|
| コンテスト | |
| ユーザー |
threepipes_s
|
| 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());
}
}
threepipes_s