結果

問題 No.332 数列をプレゼントに
ユーザー uwiuwi
提出日時 2015-12-25 00:58:59
言語 Java21
(openjdk 21)
結果
AC  
実行時間 190 ms / 2,000 ms
コード長 4,006 bytes
コンパイル時間 5,068 ms
コンパイル使用メモリ 80,672 KB
実行使用メモリ 57,236 KB
最終ジャッジ日時 2023-08-28 18:03:26
合計ジャッジ時間 13,506 ms
ジャッジサーバーID
（参考情報） 		judge12 / judge14
このコードへのチャレンジ
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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 55 ms
55,000 KB
testcase_01 AC 55 ms
55,000 KB
testcase_02 AC 55 ms
55,048 KB
testcase_03 AC 55 ms
54,960 KB
testcase_04 AC 58 ms
54,896 KB
testcase_05 AC 56 ms
54,908 KB
testcase_06 AC 74 ms
55,296 KB
testcase_07 AC 160 ms
56,044 KB
testcase_08 AC 56 ms
55,004 KB
testcase_09 AC 69 ms
55,928 KB
testcase_10 AC 173 ms
56,268 KB
testcase_11 AC 56 ms
55,312 KB
testcase_12 AC 57 ms
55,048 KB
testcase_13 AC 59 ms
56,208 KB
testcase_14 AC 56 ms
54,856 KB
testcase_15 AC 77 ms
56,012 KB
testcase_16 AC 60 ms
55,044 KB
testcase_17 AC 56 ms
55,028 KB
testcase_18 AC 72 ms
55,996 KB
testcase_19 AC 55 ms
54,944 KB
testcase_20 AC 61 ms
55,412 KB
testcase_21 AC 62 ms
56,076 KB
testcase_22 AC 60 ms
55,140 KB
testcase_23 AC 105 ms
56,160 KB
testcase_24 AC 147 ms
56,064 KB
testcase_25 AC 173 ms
55,872 KB
testcase_26 AC 123 ms
56,048 KB
testcase_27 AC 56 ms
55,028 KB
testcase_28 AC 173 ms
56,060 KB
testcase_29 AC 176 ms
55,164 KB
testcase_30 AC 92 ms
56,236 KB
testcase_31 AC 177 ms
56,144 KB
testcase_32 AC 178 ms
55,164 KB
testcase_33 AC 162 ms
55,800 KB
testcase_34 AC 190 ms
57,236 KB
testcase_35 AC 142 ms
56,052 KB
testcase_36 AC 56 ms
54,876 KB
testcase_37 AC 149 ms
56,184 KB
testcase_38 AC 147 ms
55,060 KB
testcase_39 AC 153 ms
56,372 KB
testcase_40 AC 145 ms
55,516 KB
testcase_41 AC 174 ms
55,948 KB
testcase_42 AC 146 ms
56,292 KB
testcase_43 AC 177 ms
55,620 KB
testcase_44 AC 77 ms
55,748 KB
testcase_45 AC 150 ms
55,096 KB
testcase_46 AC 149 ms
54,580 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

package contest;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.InputMismatchException;

public class Q894 {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		int n = ni();
		long x = nl();
		int[] a = na(n);
		int[][] ai = new int[n][];
		for(int i = 0;i < n;i++){
			ai[i] = new int[]{a[i], i};
		}
		Arrays.sort(ai, new Comparator<int[]>() {
			public int compare(int[] a, int[] b) {
				return a[0] - b[0];
			}
		});
		int larger = Math.min(20, n);
		int smaller = n-larger;
		
		int z = 1000000;
		boolean[] dp = new boolean[z];
		int ls = 0;
		int[] prev = new int[z];
		Arrays.fill(prev, -1);
		dp[0] = true;
		for(int i = 0;i < smaller;i++){
			for(int j = ls;j >= 0;j--){
				if(!dp[j+ai[i][0]] && dp[j]){
					dp[j+ai[i][0]] = true;
					prev[j+ai[i][0]] = i;
				}
			}
			ls += ai[i][0];
		}
		for(int i = 0;i < 1<<larger;i++){
			long sum = 0;
			for(int j = 0;j < larger;j++){
				if(i<<~j<0){
					sum += ai[smaller+j][0];
				}
			}
			long rem = x-sum;
			if(0 <= rem && rem < z && dp[(int)rem]){
				char[] ret = new char[n];
				Arrays.fill(ret, 'x');
				for(int j = 0;j < larger;j++){
					if(i<<~j<0){
						ret[ai[smaller+j][1]] = 'o';
					}
				}
				int y = (int)rem;
				while(y != 0){
					ret[ai[prev[y]][1]] = 'o';
					y -= ai[prev[y]][0];
				}
				out.println(new String(ret));
				return;
			}
		}
		out.println("No");
	}
	
	void run() throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
	}
	
	public static void main(String[] args) throws Exception { new Q894().run(); }
	
	private byte[] inbuf = new byte[1024];
	private int lenbuf = 0, ptrbuf = 0;
	
	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }
	
	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private char[][] nm(int n, int m)
	{
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private int ni()
	{
		int num = 0, b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}
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