結果

問題 No.910 素数部分列
ユーザー uwiuwi
提出日時 2019-10-18 22:37:24
言語 Java21
(openjdk 21)
結果
WA  
実行時間 -
コード長 3,442 bytes
コンパイル時間 4,263 ms
コンパイル使用メモリ 80,640 KB
実行使用メモリ 38,796 KB
最終ジャッジ日時 2024-06-25 17:46:30
合計ジャッジ時間 9,822 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
(要ログイン)

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 53 ms
36,848 KB
testcase_01 AC 53 ms
36,892 KB
testcase_02 AC 54 ms
36,880 KB
testcase_03 AC 53 ms
36,988 KB
testcase_04 AC 52 ms
36,956 KB
testcase_05 AC 53 ms
36,820 KB
testcase_06 AC 52 ms
37,036 KB
testcase_07 AC 52 ms
37,120 KB
testcase_08 AC 52 ms
37,000 KB
testcase_09 AC 53 ms
36,888 KB
testcase_10 AC 52 ms
36,964 KB
testcase_11 AC 52 ms
37,136 KB
testcase_12 AC 52 ms
37,092 KB
testcase_13 WA -
testcase_14 AC 52 ms
36,848 KB
testcase_15 WA -
testcase_16 AC 53 ms
36,828 KB
testcase_17 WA -
testcase_18 AC 52 ms
36,992 KB
testcase_19 AC 53 ms
36,728 KB
testcase_20 WA -
testcase_21 AC 51 ms
36,820 KB
testcase_22 WA -
testcase_23 WA -
testcase_24 WA -
testcase_25 WA -
testcase_26 WA -
testcase_27 WA -
testcase_28 WA -
testcase_29 WA -
testcase_30 WA -
testcase_31 WA -
testcase_32 WA -
testcase_33 WA -
testcase_34 WA -
testcase_35 WA -
testcase_36 WA -
testcase_37 WA -
testcase_38 WA -
testcase_39 WA -
testcase_40 WA -
testcase_41 WA -
testcase_42 WA -
testcase_43 AC 88 ms
38,384 KB
testcase_44 AC 89 ms
38,564 KB
testcase_45 WA -
testcase_46 WA -
testcase_47 WA -
testcase_48 AC 77 ms
38,356 KB
testcase_49 AC 87 ms
38,508 KB
testcase_50 AC 88 ms
38,328 KB
testcase_51 AC 89 ms
38,272 KB
testcase_52 AC 88 ms
38,156 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 contest191018;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;

public class C2 {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	// 5は素数だった
	void solve()
	{
		int n = ni();
		char[] s = ns(n);
		int ans = 0;
		// 3 5 7
		// 11 19
		for(char c : s) {
			if(c == '3' || c == '5' || c == '7') {
				ans++;
			}
		}
		
		int nine = 0;
		int one = 0;
		for(int i = n-1;i >= 0;i--) {
			if(s[i] == '9') {
				nine++;
			}else if(s[i] == '1') {
				if(nine > 0) {
					ans++;
					nine--;
				}else {
					one++;
				}
			}
		}
		ans += one/2;
		out.println(ans);
	}

	
	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");
//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
//			@Override
//			public void run() {
//				long s = System.currentTimeMillis();
//				solve();
//				out.flush();
//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//			}
//		};
//		t.start();
//		t.join();
	}
	
	public static void main(String[] args) throws Exception { new C2().run(); }
	
	private byte[] inbuf = new byte[1024];
	public 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 int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		return a;
	}
	
	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[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	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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