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Datatähti 2015 loppu

Start:2015-01-29 12:15:00
End:2015-01-29 17:15:00
 

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CSES - Datatähti 2015 loppu - Results
History
2015-01-29 12:23:50100
Task:Omenat
Sender:Kuha
Submission time:2015-01-29 12:23:50
Language:Java
Status:READY
Score:100

Feedback

groupverdictscore
#1ACCEPTED17
#2ACCEPTED30
#3ACCEPTED53

Test results

testverdicttime (s)group
#1ACCEPTED0.03 / 2.001details
#2ACCEPTED0.04 / 2.001details
#3ACCEPTED0.03 / 2.001details
#4ACCEPTED0.04 / 2.001details
#5ACCEPTED0.09 / 2.001details
#6ACCEPTED0.05 / 2.001details
#7ACCEPTED0.06 / 2.002details
#8ACCEPTED0.04 / 2.002details
#9ACCEPTED0.04 / 2.002details
#10ACCEPTED0.02 / 2.002details
#11ACCEPTED0.04 / 2.002details
#12ACCEPTED0.03 / 2.002details
#13ACCEPTED0.31 / 2.003details
#14ACCEPTED0.33 / 2.003details
#15ACCEPTED0.36 / 2.003details
#16ACCEPTED0.34 / 2.003details
#17ACCEPTED0.33 / 2.003details
#18ACCEPTED0.33 / 2.003details

Code

import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Main {
    public static void main(String[] args) {
        IO io = new IO();
        int n = io.nextInt();
        
        int omenat[] = new int[n];
        long yhteispaino = 0;
        
        boolean yksi1 = false;
        boolean kaksi1 = false;
        boolean yksi2 = false;
        boolean kaksi2 = false;
        
        for (int i = 0; i < n; i++) {
            int omppu = io.nextInt() % 3;
            if (omppu != 0) {
                if (omppu == 1) {
                    if (yksi1) {
                        yksi2 = true;
                    } else {
                        yksi1 = true;
                    }
                } else {
                    if (kaksi1) {
                        kaksi2 = true;
                    } else {
                        kaksi1 = true;
                    }
                }
            }
            omenat[i] = omppu;
            yhteispaino = (yhteispaino + omppu) % 3;
        }
        
        int maara = n;
        if (yhteispaino % 3 != 0) {
            if (yhteispaino == 1) {
                if (yksi1) { maara--; } else { maara -= 2; }
            } else {
                if (kaksi1) { maara--; } else { maara -= 2; }
            }
        }
        
        io.println(maara);
        
        io.close();
    }
}

class IO extends PrintWriter {
	private InputStreamReader r;
	private static final int BUFSIZE = 1 << 15;
	private char[] buf;
	private int bufc;
	private int bufi;
	private StringBuilder sb;
	
	public IO() {
		super(new BufferedOutputStream(System.out));
		r = new InputStreamReader(System.in);
		
		buf = new char[BUFSIZE];
		bufc = 0;
		bufi = 0;
		sb = new StringBuilder();
	}
	
	private void fillBuf() throws IOException {
		bufi = 0;
		bufc = 0;
		while(bufc == 0) {
			bufc = r.read(buf, 0, BUFSIZE);
			if(bufc == -1) {
				bufc = 0;
				return;
			}
		}
	}
	
	private boolean pumpBuf() throws IOException {
		if(bufi == bufc) {
			fillBuf();
		}
		return bufc != 0;
	}
	
	private boolean isDelimiter(char c) {
		return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f';
	}
	
	private void eatDelimiters() throws IOException {
		while(true) {
			if(bufi == bufc) {
				fillBuf();
				if(bufc == 0) throw new RuntimeException("IO: Out of input.");
			}
			
			if(!isDelimiter(buf[bufi])) break;
			++bufi;
		}
	}
	
	public String next() {
		try {
			sb.setLength(0);
			
			eatDelimiters();
			int start = bufi;
			
			while(true) {
				if(bufi == bufc) {
					sb.append(buf, start, bufi - start);
					fillBuf();
					start = 0;
					if(bufc == 0) break;
				}
				
				if(isDelimiter(buf[bufi])) break;
				++bufi;
			}
			
			sb.append(buf, start, bufi - start);
			
			return sb.toString();
		} catch(IOException e) {
			throw new RuntimeException("IO.next: Caught IOException.");
		}
	}
	
	public int nextInt() {
		try {
			int ret = 0;
			
			eatDelimiters();
			
			boolean positive = true;
			if(buf[bufi] == '-') {
				++bufi;
				if(!pumpBuf()) throw new RuntimeException("IO.nextInt: Invalid int.");
				positive = false;
			}
			
			boolean first = true;
			while(true) {
				if(!pumpBuf()) break;
				if(isDelimiter(buf[bufi])) {
					if(first) throw new RuntimeException("IO.nextInt: Invalid int.");
					break;
				}
				first = false;
				
				if(buf[bufi] >= '0' && buf[bufi] <= '9') {
					if(ret < -214748364) throw new RuntimeException("IO.nextInt: Invalid int.");
					ret *= 10;
					ret -= (int)(buf[bufi] - '0');
					if(ret > 0) throw new RuntimeException("IO.nextInt: Invalid int.");
				} else {
					throw new RuntimeException("IO.nextInt: Invalid int.");
				}
				
				++bufi;
			}
			
			if(positive) {
				if(ret == -2147483648) throw new RuntimeException("IO.nextInt: Invalid int.");
				ret = -ret;
			}
			
			return ret;
		} catch(IOException e) {
			throw new RuntimeException("IO.nextInt: Caught IOException.");
		}
	}
	
	public long nextLong() {
		try {
			long ret = 0;
			
			eatDelimiters();
			
			boolean positive = true;
			if(buf[bufi] == '-') {
				++bufi;
				if(!pumpBuf()) throw new RuntimeException("IO.nextLong: Invalid long.");
				positive = false;
			}
			
			boolean first = true;
			while(true) {
				if(!pumpBuf()) break;
				if(isDelimiter(buf[bufi])) {
					if(first) throw new RuntimeException("IO.nextLong: Invalid long.");
					break;
				}
				first = false;
				
				if(buf[bufi] >= '0' && buf[bufi] <= '9') {
					if(ret < -922337203685477580L) throw new RuntimeException("IO.nextLong: Invalid long.");
					ret *= 10;
					ret -= (long)(buf[bufi] - '0');
					if(ret > 0) throw new RuntimeException("IO.nextLong: Invalid long.");
				} else {
					throw new RuntimeException("IO.nextLong: Invalid long.");
				}
				
				++bufi;
			}
			
			if(positive) {
				if(ret == -9223372036854775808L) throw new RuntimeException("IO.nextLong: Invalid long.");
				ret = -ret;
			}
			
			return ret;
		} catch(IOException e) {
			throw new RuntimeException("IO.nextLong: Caught IOException.");
		}
	}
	
	public double nextDouble() {
		return Double.parseDouble(next());
	}
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
20
34 98 42 72 75 91 76 30 98 7 1...
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correct output
20

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user output
20

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Test 2

Group: 1

Verdict: ACCEPTED

input
20
20 97 85 24 47 57 69 92 21 72 ...
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correct output
19

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user output
19

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Test 3

Group: 1

Verdict: ACCEPTED

input
20
36 35 3 15 84 14 24 33 39 27 7...
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correct output
18

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user output
18

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Test 4

Group: 1

Verdict: ACCEPTED

input
20
75 87 27 66 14 48 34 1 52 47 7...
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correct output
20

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user output
20

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Test 5

Group: 1

Verdict: ACCEPTED

input
20
83 7 54 38 21 51 61 61 14 32 3...
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correct output
19

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user output
19

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Test 6

Group: 1

Verdict: ACCEPTED

input
20
76 24 28 45 36 87 81 21 48 43 ...
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correct output
18

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user output
18

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Test 7

Group: 2

Verdict: ACCEPTED

input
100
9 48 27 13 12 23 23 35 14 58 2...
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correct output
100

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user output
100

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Test 8

Group: 2

Verdict: ACCEPTED

input
100
22 87 66 23 77 17 41 66 31 40 ...
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correct output
99

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user output
99

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Test 9

Group: 2

Verdict: ACCEPTED

input
100
90 50 48 47 20 93 36 48 69 2 6...
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correct output
98

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user output
98

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Test 10

Group: 2

Verdict: ACCEPTED

input
100
88 39 9 21 51 92 94 75 71 19 8...
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correct output
100

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user output
100

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Test 11

Group: 2

Verdict: ACCEPTED

input
100
76 37 49 50 59 68 6 100 48 18 ...
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correct output
99

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user output
99

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Test 12

Group: 2

Verdict: ACCEPTED

input
100
78 45 100 25 90 85 33 90 45 54...
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correct output
98

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user output
98

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Test 13

Group: 3

Verdict: ACCEPTED

input
100000
460655049 593289072 315159623 ...
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correct output
100000

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user output
100000

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Test 14

Group: 3

Verdict: ACCEPTED

input
100000
935436362 204516709 337519402 ...
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correct output
99999

view   save

user output
99999

view   save

Test 15

Group: 3

Verdict: ACCEPTED

input
100000
68654915 40061376 215300034 43...
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correct output
99998

view   save

user output
99998

view   save

Test 16

Group: 3

Verdict: ACCEPTED

input
100000
435410962 22254303 500625758 6...
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correct output
100000

view   save

user output
100000

view   save

Test 17

Group: 3

Verdict: ACCEPTED

input
100000
230562634 84329865 874955526 8...
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correct output
99999

view   save

user output
99999

view   save

Test 18

Group: 3

Verdict: ACCEPTED

input
100000
29734968 168066517 710394372 3...
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correct output
99998

view   save

user output
99998

view   save