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.ArrayList;
import java.util.List;
import java.util.Scanner;


/**
 *
 * @author Sonicxd2
 */
public class Server {
    static List<Boolean> server;
    static ArrayList<Task> tasks;
    public static void main(String[] args) {
        server=new ArrayList<Boolean>();
        tasks=new ArrayList<Task>();
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int q=sc.nextInt();
        for(int i=0;i<n;i++){
            server.add(Boolean.TRUE);
        }
        int avaibleServer=n;
        for(int i=0;i<q;i++){
            int t=sc.nextInt();
            int k=sc.nextInt();
            int d=sc.nextInt();
            for(Task t2:tasks){
                if(t2.time==t){
                    for(int g:t2.servers) server.set(g, Boolean.TRUE);
                    avaibleServer=0;
                    for(boolean s:server) if(s)avaibleServer++;
                }
            }
            if(k<=avaibleServer){
                int[] ids=new int[k];
                int f=0;
                for(int h=0;h<k;){
                    if(server.get(f)){
                        ids[h]=f;
                        server.set(f, Boolean.FALSE);
                        h++;
                    }
                    f++;
                }
                tasks.add(new Task(t+d, ids));
                avaibleServer=0;
                for(boolean s:server) if(s)avaibleServer++;
                int res=0;
                for(int id:ids){
                    res=res+id+1;
                    
                }
                System.out.println(res);
            } else System.out.println("-1");
        }
    }
    
    public static class Task{
        int time;
        int[] servers;

        public Task(int time, int[] servers) {
            this.time = time;
            this.servers = servers;
        }
        
    }
}
