Really good puzzle, it’s funny how I see that people write complicated code or just few lines.
I belong to the first group, after submitting i see how i can optimize instead just using IF
Hi, could really use some help (Im using java)
And yes i know it looks like a mess i started debugging and splitting it into separate parts for better debugging…
Problem 1 and 4 are easy, but when i run my code for problem 3 and 4 i get and index out of bounds exception 
any ideas why?
And i would also appreciate if someone could give me a little hint on how to tackle the problem of multiple x in one row since my code isnt built for that right now
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
int w = in.nextInt();
int h = in.nextInt();
if (in.hasNextLine()) {
in.nextLine();
}
String[] field = new String[h];
int[] xRow = new int[h];
String[] xlineRow = new String[h];
int row = 0;
for (int i = 0; i < h; i++) {
String line = in.nextLine();
System.err.println("WANTED: " + line);
field[i] = line;
if(line.contains("x")){
xRow[row] = i; //saves row (das was nach unten geht)
xlineRow[row] = line; //saves string
}
row++;
}
//System.err.println(xRow[0] + 1);
//TODO: wenn mehrere x in einer zeile dann durch alle durchgehen und umwandeln
if(xRow.length != 0 && xRow != null){ //if there is at least one x
for(int i = 0; i < h; i++){ //for every row
if(xRow[i] != 0){
int temp = xRow[i]; //x row
int location = xlineRow[i].indexOf("x"); //x location
int locationL = location-1; //left same row
int locationM = location; //x loc same row;
int locationR = location+1; //right same row
String newStr = field[temp]; //make new row to overwrite it
//for same row
//check if already has a number
if(Character.getNumericValue(newStr.charAt(locationL)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationL));
number += 1;
newStr = newStr.substring(0, locationL) + number + newStr.substring(locationL+1);
} else {
newStr = newStr.substring(0, locationL) + "1" + newStr.substring(locationL+1);
}
if(Character.getNumericValue(newStr.charAt(locationR)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationR));
number += 1;
newStr = newStr.substring(0, locationR) + number + newStr.substring(locationR+1);
} else {
newStr = newStr.substring(0, locationR) + "1" + newStr.substring(locationR+1);
}
//newStr = newStr.substring(0, locationL) + "1" + newStr.substring(locationL+1);
newStr = newStr.substring(0, locationM) + "." + newStr.substring(locationM+1); //place dot where x was
//newStr = newStr.substring(0, locationR) + "1" + newStr.substring(locationR+1);
field[temp] = newStr; //same row
//for upper
newStr = field[temp-1];
//newStr = newStr.substring(0, locationL) + "1" + newStr.substring(locationL+1);
//newStr = newStr.substring(0, locationM) + "1" + newStr.substring(locationM+1);
//newStr = newStr.substring(0, locationR) + "1" + newStr.substring(locationR+1);
if(Character.getNumericValue(newStr.charAt(locationL)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationL));
number += 1;
newStr = newStr.substring(0, locationL) + number + newStr.substring(locationL+1);
} else {
newStr = newStr.substring(0, locationL) + "1" + newStr.substring(locationL+1);
}
if(Character.getNumericValue(newStr.charAt(locationM)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationM));
number += 1;
newStr = newStr.substring(0, locationM) + number + newStr.substring(locationM+1);
} else {
newStr = newStr.substring(0, locationM) + "1" + newStr.substring(locationM+1);
}
if(Character.getNumericValue(newStr.charAt(locationR)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationR));
number += 1;
newStr = newStr.substring(0, locationR) + number + newStr.substring(locationR+1);
} else {
newStr = newStr.substring(0, locationR) + "1" + newStr.substring(locationR+1);
}
field[temp-1] = newStr; //saves as new row
//for lower
newStr = field[temp+1];
//newStr = newStr.substring(0, locationL) + "1" + newStr.substring(locationL+1);
//newStr = newStr.substring(0, locationM) + "1" + newStr.substring(locationM+1);
//newStr = newStr.substring(0, locationR) + "1" + newStr.substring(locationR+1);
if(Character.getNumericValue(newStr.charAt(locationL)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationL));
number += 1;
newStr = newStr.substring(0, locationL) + number + newStr.substring(locationL+1);
} else {
newStr = newStr.substring(0, locationL) + "1" + newStr.substring(locationL+1);
}
if(Character.getNumericValue(newStr.charAt(locationM)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationM));
number += 1;
newStr = newStr.substring(0, locationM) + number + newStr.substring(locationM+1);
} else {
newStr = newStr.substring(0, locationM) + "1" + newStr.substring(locationM+1);
}
if(Character.getNumericValue(newStr.charAt(locationR)) != -1) {
int number = Character.getNumericValue(newStr.charAt(locationR));
number += 1;
newStr = newStr.substring(0, locationR) + number + newStr.substring(locationR+1);
} else {
newStr = newStr.substring(0, locationR) + "1" + newStr.substring(locationR+1);
}
field[temp+1] = newStr; //saves as new row
}
}
}
System.err.println("\n");
System.err.println("--- Output ---");
System.err.println("\n");
for(int i = 0; i < h; i++){
System.out.println(field[i]);
}
}
Maybe you have not check the doc
The method throws an IndexOutOfBoundException when :
- the startIndex is larger than the length of String
- the startIndex isless than zero
- startIndex is greater than endIndex
- endIndex is greater than length of String
for exemple with your code :
If location == 0 then locationL == -1
and it results as
newStr.substring(0, -1)
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