# FIILMTR what is wrong with my logic

Problem Statement : [FILLMTR][1]

My Solution :

``````import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{	public static void main (String[] args) throws java.lang.Exception{
Scanner scan = new Scanner(System.in);
int t = scan.nextInt();

while(t-- != 0){
int n = scan.nextInt();
int q = scan.nextInt();
int[] arr = new int[n];
Arrays.fill(arr, -2);
boolean flag = true;

for(int i = 0; i < q; i++){
int x = scan.nextInt() - 1;
int y = scan.nextInt() - 1;
int val = scan.nextInt();
if(!flag)
continue;

if(arr[x] == -2 && arr[y] == -2){
if(val == 0){
arr[x] = 0;
arr[y] = 0;
}
else{
arr[x] = 1;
arr[y] = 0;
}
}

else if(arr[x] == -2){
if(val == arr[y]){
arr[x] = 0;
}
else{
arr[x] = 1;
}
}

else if(arr[y] == -2){
if(val == arr[x]){
arr[y] = 0;
}
else{
arr[y] = 1;
}
}

else{
if(val == 1)
flag = arr[x] != arr[y];

else
flag = arr[x] == arr[y];
}
}

if(flag)
System.out.println("yes");
else
System.out.println("no");

}
}
}
``````

I saw the solution using the graph coloring approach but I am not able to understand what is wrong with my logic and the testcases which would give WA for this.
[1]: https://www.codechef.com/problems/FILLMTR