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 sc = new Scanner(System.in);
		
		int s = sc.nextInt(), tasks = sc.nextInt();
		
		int come[] = new int[tasks], uses[] = new int[tasks], time[] = new int[tasks];
		
		for(int i=0 ; i<tasks ; i++){
			come[i] = sc.nextInt();
			uses[i] = sc.nextInt();
			time[i] = sc.nextInt();
		}
		
		int server[] = new int[s];
		
		for(int i=0 ; i<tasks ; i++){
			int count=0;
			for(int t : server){
				if(come[i]>t)
					count++;
			}
			
			if(count>=uses[i]){
				int j=0,sum=0;
				
				while(uses[i]>0){
					
					if(server[j]<come[i]){
						sum+=j+1;
						server[j] = come[i] + time[i] -1;
						uses[i]--;
					}
					
					j++;
				}
				
				System.out.println(sum);
			}
			else{
				System.out.println(-1);
			}
			
		}
	}
}