//quan tuong

import java.util.Scanner;


public class Solution {
static int A[][];
static int kiux[]=new int[1000000];
static int kiuy[]=new int[1000000];
static int kius[]=new int[1000000];
static int l,r,s;
static int trongso[][];
static boolean danhdau[][];
	public static void main(String[] args)  {
		//System.setIn(new FileInputStream("quantuong.txt"));
		Scanner sc=new Scanner(System.in);
		int T=sc.nextInt();
		for (int t = 1; t <=T; t++) {
			int n=sc.nextInt();
			int m=sc.nextInt();
			int bdx=n-sc.nextInt();
			int bdy=sc.nextInt()-1;
			int ktx=n-sc.nextInt();
			int kty=sc.nextInt()-1;
		
			A=new int[n][n];
			for (int i = 0; i < m; i++) {
				A[n-sc.nextInt()][sc.nextInt()-1]=1;
			}
			trongso=new int[n][n];
			danhdau=new boolean[n][n];
			l=-1;r=-1;
			push(bdx,bdy,0);
			while(l!=r){
				pop();
				int x=kiux[l];
				int y=kiuy[l];
				int s=kius[l];
				
				int j=y;
				for (int i = x; i>=0&&j<A.length; i--) {
					if(A[i][j]==1) break;
					if(A[i][j]==0&&!danhdau[i][j]){
						push(i, j, s+1);
					}
					if(A[i][j]==0&&danhdau[i][j]&&s+1<trongso[i][j]){
						push(i, j, s+1);
					}
					j++;
				}
				j=y;
				for (int i = x; i>=0&&j>=0; i--) {
					if(A[i][j]==1) break;
					if(A[i][j]==0&&!danhdau[i][j]){
						push(i, j, s+1);
					}
					if(A[i][j]==0&&danhdau[i][j]&&s+1<trongso[i][j]){
						push(i, j, s+1);
					}
					j--;
				}
				
				j=y;
				for (int i = x; i<A.length&&j<A.length; i++) {
					if(A[i][j]==1) break;
					if(A[i][j]==0&&!danhdau[i][j]){
						push(i, j, s+1);
					}
					if(A[i][j]==0&&danhdau[i][j]&&s+1<trongso[i][j]){
						push(i, j, s+1);
					}
					j++;
				}
				j=y;
				for (int i = x; i<A.length&&j>=0; i++) {
					if(A[i][j]==1) break;
					if(A[i][j]==0&&!danhdau[i][j]){
						push(i, j, s+1);
					}
					if(A[i][j]==0&&danhdau[i][j]&&s+1<trongso[i][j]){
						push(i, j, s+1);
					}
					j--;
				}
			}
			System.out.println(trongso[ktx][kty]);
		}
	}
	static void push(int x,int y, int s){
		kiux[++r]=x;
		kiuy[r]=y;
		kius[r]=s;
		danhdau[x][y]=true;
		trongso[x][y]=s;
	}
	static void pop(){
		l++;
	}

}

Line 3: error: 'import' does not name a type
compilation terminated due to -Wfatal-errors.