結果

問題 No.4 おもりと天秤
ユーザー tutuztutuz
提出日時 2018-09-22 09:30:21
言語 Java21
(openjdk 21)
結果
AC  
実行時間 62 ms / 5,000 ms
コード長 3,166 bytes
コンパイル時間 2,237 ms
コンパイル使用メモリ 77,560 KB
実行使用メモリ 51,764 KB
最終ジャッジ日時 2023-09-25 10:58:03
合計ジャッジ時間 4,793 ms
ジャッジサーバーID
(参考情報)
judge13 / 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 54 ms
50,640 KB
testcase_01 AC 54 ms
50,544 KB
testcase_02 AC 57 ms
50,512 KB
testcase_03 AC 54 ms
50,556 KB
testcase_04 AC 55 ms
50,712 KB
testcase_05 AC 60 ms
51,764 KB
testcase_06 AC 56 ms
50,600 KB
testcase_07 AC 60 ms
51,276 KB
testcase_08 AC 57 ms
50,640 KB
testcase_09 AC 62 ms
51,572 KB
testcase_10 AC 59 ms
51,728 KB
testcase_11 AC 57 ms
50,632 KB
testcase_12 AC 55 ms
50,752 KB
testcase_13 AC 55 ms
50,560 KB
testcase_14 AC 55 ms
50,936 KB
testcase_15 AC 55 ms
50,568 KB
testcase_16 AC 56 ms
50,900 KB
testcase_17 AC 57 ms
50,576 KB
testcase_18 AC 60 ms
51,116 KB
testcase_19 AC 58 ms
51,576 KB
testcase_20 AC 60 ms
51,100 KB
testcase_21 AC 58 ms
51,756 KB
testcase_22 AC 58 ms
50,900 KB
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ソースコード

diff #

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.util.StringTokenizer;

public class Main {

	public static void main(String[] args) throws IOException {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		InputReader in = new InputReader(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		TaskX solver = new TaskX();
		solver.solve(1, in, out);
		out.close();
	}

	static int INF = 1 << 30;
	static long LINF = 1L << 55;
	static int MOD = 1000000007;
	static int[] mh4 = { 0, -1, 1, 0 };
	static int[] mw4 = { -1, 0, 0, 1 };
	static int[] mh8 = { -1, -1, -1, 0, 0, 1, 1, 1 };
	static int[] mw8 = { -1, 0, 1, -1, 1, -1, 0, 1 };

	static class TaskX {

		public void solve(int testNumber, InputReader in, PrintWriter out) {

			int n = in.nextInt();
			int[] a = in.nextIntArray(n);
			int tar = Arrays.stream(a).sum();

			if (tar % 2 == 1) {
				out.println("impossible");
				return;
			}
			tar /= 2;

			BigInteger bit = new BigInteger("1");
			for (int i = 0; i < n; i++) {
				bit = bit.or(bit.shiftLeft(a[i]));
			}

			out.println(bit.testBit(tar) ? "possible" : "impossible");
		}
	}

	static class InputReader {
		BufferedReader in;
		StringTokenizer tok;

		public String nextString() {
			while (!tok.hasMoreTokens()) {
				try {
					tok = new StringTokenizer(in.readLine(), " ");
				} catch (IOException e) {
					throw new InputMismatchException();
				}
			}
			return tok.nextToken();
		}

		public int nextInt() {
			return Integer.parseInt(nextString());
		}

		public long nextLong() {
			return Long.parseLong(nextString());
		}

		public double nextDouble() {
			return Double.parseDouble(nextString());
		}

		public int[] nextIntArray(int n) {
			int[] res = new int[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextInt();
			}
			return res;
		}

		public int[] nextIntArrayDec(int n) {
			int[] res = new int[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextInt() - 1;
			}
			return res;
		}

		public int[] nextIntArray1Index(int n) {
			int[] res = new int[n + 1];
			for (int i = 0; i < n; i++) {
				res[i + 1] = nextInt();
			}
			return res;
		}

		public long[] nextLongArray(int n) {
			long[] res = new long[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextLong();
			}
			return res;
		}

		public long[] nextLongArrayDec(int n) {
			long[] res = new long[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextLong() - 1;
			}
			return res;
		}

		public long[] nextLongArray1Index(int n) {
			long[] res = new long[n + 1];
			for (int i = 0; i < n; i++) {
				res[i + 1] = nextLong();
			}
			return res;
		}

		public double[] nextDoubleArray(int n) {
			double[] res = new double[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextDouble();
			}
			return res;
		}

		public InputReader(InputStream inputStream) {
			in = new BufferedReader(new InputStreamReader(inputStream));
			tok = new StringTokenizer("");
		}
	}

}
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