Hello all,
I am trying to solve the Stable Wall problem but I got a WA even for the
first use case but I don't know why ?
I tried multiple use case and all is ok on my side but not ok on the
Judgment engine.
Here is my code :
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;
import java.util.Set;
import java.util.stream.Collectors;
public class Solution {
static Solution sol = new Solution();
public static void main(String[] args) {
Scanner scann = new Scanner(System.in); // Create a Scanner object
int T = scann.nextInt();
for(int usease = 0; usease< T;usease++) {
boolean hasSolution = false;
int R = scann.nextInt();
int C = scann.nextInt();
LinkedHashSet<String> solution = new LinkedHashSet<>();
Set<String> allPolyominos = new HashSet<>();
List<List<String>> table = new ArrayList<>();
for(int i = 0;i < R ;i++) {
List<String> currentLine = Arrays.asList(scann.next().split(""));
table.add(currentLine);
allPolyominos.addAll(currentLine.stream().collect(Collectors.toSet()));
if(i>0) {//If not the first line
List<String> previousLine = table.get(i-1);
for(int j = 0 ; j < C ; j++) {
if(!currentLine.get(j).contentEquals(previousLine.get(j))) {//Check each
cell of the current line with the previous from top to bottom and if
different add the previous line Polyominos
solution.add(previousLine.get(j));
}
}
}
}
if(allPolyominos.size()!=solution.size()) {//There is a solution if all
Polyominos are not in the solution list, meaning a Polyominos reach the
bottom of the Wall
allPolyominos.removeAll(solution);
solution.addAll(allPolyominos);
hasSolution= true;
}
//Format the answer
Iterator<String> iterator = solution.iterator();
StringBuilder sb = new StringBuilder();
while(iterator.hasNext()) {
sb.append(iterator.next());
}
if(hasSolution)
System.out.println(String.format("Case #%s: %s",usease+1,sb.reverse().
toString()));
else
System.out.println(String.format("Case #%s: -1",usease+1));
}
}
}
If you see any mistakes, thx.
Regards
Quentin
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