Bittipeli

public class Bites {
	static int[] winning;
	
	public static int getPossibilities(String bitString) {
		int dominant = -1;
		char[] bits = bitString.toCharArray();
		int result = 0;
		
		for(int i = 0; i < bits.length - 1; i++) {
			if(dominant != bits[i]) {
				dominant = bits[i];
				if(bits[i+1] == dominant) result++;
			}
		}
		
		return result;
	}
	
	public static int getSerieLocation(String bitString, int serie) {
		int dominant = -1;
		int result = 0;
		char[] bits;
		
		while(true) {
			bits = bitString.toCharArray();
			
			if(bits[0] != bits[1]) {
				bitString = bitString.substring(1);
				result++;
			} else if(serie > 0) {
				dominant = bits[0];
				
				while(bits[0] == dominant) {
					bitString = bitString.substring(1);
					bits = bitString.toCharArray();
					result++;
				}
				
				serie--;
			} else return result;
		}
	}
	
	public static int getSerieLength(String bitString, int location) {
		char[] bits = bitString.toCharArray();
		int result = 0;
		int dominant = bits[location];
		
		for(int i = location; i < bits.length; i++) {
			if(dominant == bits[i]) result++;
			else return result;
		}
		
		return result;
	}
	
	public static String removeSerie(String bitString, int serie) {
		char[] bits = bitString.toCharArray();
		int serieLocation = getSerieLocation(bitString, serie),
				serieLength = getSerieLength(bitString, serieLocation);
		
		StringBuilder result = new StringBuilder();
		
		for(int i = 0; i < bits.length; i++) {
			if(i < serieLocation || i >= serieLocation+serieLength) {
				result.append(bits[i]);
			}
		}
		
		return result.toString();
	}
	
	public static boolean isAllDone(String bitString) {
		char[] bits = bitString.toCharArray();
		int dominant = bits[0];
		
		for(int i = 0; i < bits.length; i++)
			if(bits[i] != dominant)
				return false;
		
		return true;
	}
	
	public static int[] appendTo(int[] arr, int value) {
		int[] newArr = new int[arr.length+1];
		
		for(int i = 0; i < arr.length; i++)
			newArr[i] = arr[i];
		
		newArr[arr.length] = value;
		return newArr;
	}
	
	public static boolean guess(String bitString, int[] previousGuesses) {
		if(bitString.length() == 1) return false;
		
		if(isAllDone(bitString)) {
			winning = previousGuesses;
			return true;
		}
		
		for(int i = 0; i < getPossibilities(bitString); i++) {
			if(guess(removeSerie(bitString, i), appendTo(previousGuesses, i))) return true;
		}
		
		return false;
	}
	
	public static String clean(String input) {
		char[] inputAsChars = input.toCharArray();
		String output = "" + inputAsChars[0] + inputAsChars[1];
		
		for(int i = 2; i < inputAsChars.length; i++)
			if(inputAsChars[i] != inputAsChars[i-1] || inputAsChars[i] != inputAsChars[i-2])
				output += inputAsChars[i];
		
		return output;
	}
	
	public static boolean checkBadStart(String input) {
		char[] asChars = input.toCharArray();
		
		for(int i = 0; i < asChars.length - 3; i++) {
			if(asChars[i] != asChars[i+1] && asChars[i+1] != asChars[i+2]
					&& asChars[i+2] != asChars[i+3]) {
				return true;
			}
		}
		
		return false;
	}
	
	public static void main(String[] args) {
		IO oi = new IO();
		String input = oi.next();
		boolean success = false;
		
		input = clean(input);
		
		if(checkBadStart(input)) {
			oi.println("QAQ");
			oi.close();
			return;
		}
		
		for(int i = 0; i < getPossibilities(input); i++) {
			success = guess(removeSerie(input, i), new int[]{i});
			if(success) break;
		}
		
		if(success) {
			oi.println(winning.length+1);
			for(int i = 0; i < winning.length; i++)
				oi.print((winning[i]+1) + " ");
			oi.println("1");
		} else oi.println("QAQ");
		
		oi.close();
	}
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: WRONG ANSWER

Test 6

Group: 1

Verdict: ACCEPTED

Test 7

Group: 1

Verdict: ACCEPTED

Test 8

Group: 1

Verdict: ACCEPTED

Test 9

Group: 1

Verdict: ACCEPTED

Test 10

Group: 1

Verdict: ACCEPTED

Test 11

Group: 1

Verdict: ACCEPTED

Test 12

Group: 1

Verdict: ACCEPTED

Test 13

Group: 1

Verdict: ACCEPTED

Test 14

Group: 1

Verdict: WRONG ANSWER

Test 15

Group: 1

Verdict: ACCEPTED

Test 16

Group: 1

Verdict: ACCEPTED

Test 17

Group: 1

Verdict: ACCEPTED

Test 18

Group: 1

Verdict: ACCEPTED

Test 19

Group: 1

Verdict: ACCEPTED

Test 20

Group: 1

Verdict: ACCEPTED

Test 21

Group: 2

Verdict: ACCEPTED

Test 22

Group: 2

Verdict: ACCEPTED

Test 23

Group: 2

Verdict: ACCEPTED

Test 24

Group: 2

Verdict: ACCEPTED

Test 25

Group: 2

Verdict: ACCEPTED

Test 26

Group: 2

Verdict: WRONG ANSWER

Test 27

Group: 2

Verdict: ACCEPTED

Test 28

Group: 2

Verdict: ACCEPTED

Test 29

Group: 2

Verdict: ACCEPTED

Test 30

Group: 2

Verdict: WRONG ANSWER

Test 31

Group: 2

Verdict: WRONG ANSWER

Test 32

Group: 2

Verdict: ACCEPTED

Test 33

Group: 2

Verdict: WRONG ANSWER

Test 34

Group: 2

Verdict: ACCEPTED

Test 35

Group: 2

Verdict: ACCEPTED

Test 36

Group: 2

Verdict: ACCEPTED

Test 37

Group: 2

Verdict: ACCEPTED

Test 38

Group: 2

Verdict: WRONG ANSWER

Test 39

Group: 2

Verdict: WRONG ANSWER

Test 40

Group: 2

Verdict: WRONG ANSWER

Test 41

Group: 3

Verdict: ACCEPTED

Test 42

Group: 3

Verdict: WRONG ANSWER

Test 43

Group: 3

Verdict: ACCEPTED

Test 44

Group: 3

Verdict: ACCEPTED

Test 45

Group: 3

Verdict: ACCEPTED

Test 46

Group: 3

Verdict: ACCEPTED

Test 47

Group: 3

Verdict: ACCEPTED

Test 48

Group: 3

Verdict: ACCEPTED

Test 49

Group: 3

Verdict: ACCEPTED

Test 50

Group: 3

Verdict: WRONG ANSWER

Test 51

Group: 3

Verdict: ACCEPTED

Test 52

Group: 3

Verdict: ACCEPTED

Test 53

Group: 3

Verdict: ACCEPTED

Test 54

Group: 3

Verdict: ACCEPTED

Test 55

Group: 3

Verdict: ACCEPTED

Test 56

Group: 3

Verdict: ACCEPTED

Test 57

Group: 3

Verdict: ACCEPTED

Test 58

Group: 3

Verdict: WRONG ANSWER

Test 59

Group: 3

Verdict: WRONG ANSWER

Test 60

Group: 3

Verdict: WRONG ANSWER

Test 61

Group: 4

Verdict: ACCEPTED

Test 62

Group: 4

Verdict: WRONG ANSWER

Test 63

Group: 4

Verdict: ACCEPTED

Test 64

Group: 4

Verdict: ACCEPTED

Test 65

Group: 4

Verdict: ACCEPTED

Test 66

Group: 4

Verdict: WRONG ANSWER

Test 67

Group: 4

Verdict: WRONG ANSWER

Test 68

Group: 4

Verdict: WRONG ANSWER

Test 69

Group: 4

Verdict: ACCEPTED

Test 70

Group: 4

Verdict: WRONG ANSWER

Test 71

Group: 4

Verdict: ACCEPTED

Test 72

Group: 4

Verdict: ACCEPTED

Test 73

Group: 4

Verdict: ACCEPTED

Test 74

Group: 4

Verdict: WRONG ANSWER

Test 75

Group: 4

Verdict: ACCEPTED

Test 76

Group: 4

Verdict: TIME LIMIT EXCEEDED

Test 77

Group: 4

Verdict: TIME LIMIT EXCEEDED

Test 78

Group: 4

Verdict: TIME LIMIT EXCEEDED

Test 79

Group: 4

Verdict: TIME LIMIT EXCEEDED

Test 80

Group: 4

Verdict: TIME LIMIT EXCEEDED