100 1
1000000 100 1000
 5 3
1 4 10
2 2 5
3 1 6
 10 4
1 5 20
2 5 200
100 6 20
101 1 100
 5 3
1 3 4
4 3 4
6 4 1
 4 1
6 1 1
 8 6
1 3 20
4 2 1
6 6 5
9 1 1
15 3 6
21 8 8
 4 5
1 2 3
2 1 3
3 1 2
4 3 3
5 4 1
 8 4
1 3 2
2 3 100
10 6 20
11 5 20
 4 10
1 1 1
3 1 2
4 1 2
6 1 2
8 1 2
13 1 2
16 1 1
17 1 2
19 3 1
20 1 1
 5 3
1 4 4
4 2 2
5 5 2
 4 3
1 3 10
2 2 15
12 4 1
 5 4
1 1 4
2 4 4
5 2 20
11 5 2
 1 10
4 1 1
9 1 1
10 1 1
12 1 1
13 1 1
15 1 1
16 1 1
18 1 1
19 1 1
20 1 1

5050
 10
-1
5
 15
40
-1
1
 6
-1
10
 1
 6
9
-1
4
15
36
 3
3
4
-1
10
 6
15
-1
21
 1
1
2
1
1
1
1
1
6
1
 10
-1
15
 6
-1
10
 1
14
-1
15
 1
1
1
1
1
1
1
1
1
1

import java.util.*;

public class main
{
	public static void main(String[] args)
	{
		Scanner s = new Scanner(System.in);
		int n = s.nextInt();
		int q = s.nextInt();
		server[] array = new server[n];
		
		for(int y=0;y<n;y++)
			array[y]=new server();
		
		for(int y=0;y<q;y++)
		{
			int time = s.nextInt();
			int serv = s.nextInt();
			int timet = s.nextInt();
			int count=0;
			int ind=0;
			for(int m=0; m<n; m++)
			{
				if(count==serv)
					break;
				if(array[m].occ)
				{
					if(time>=array[m].time)
					{
						array[m].time=time+timet;
						count++;
						ind+=(m+1);
					}
				}
				else
				{
					array[m].occ=true;
					array[m].time=time+timet;
					count++;
					ind+=(m+1);
				}
			}
			
			if(count<serv)
				System.out.println(-1);
			else
				System.out.println(ind); 
		}
	}
}

class server
{
	boolean occ=false;
	int time=0;
}