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.*;
import java.io.*;
import java.math.*;
import java.text.*;
public class Test{
	public static void main(String[] args) {
		FastReader sc = new FastReader();
		int n = sc.nextInt();
		int q = sc.nextInt();
		int[] arr = new int[n+1];
		int current = 0;
		for(int j=0;j<q;j++){
			int ti = sc.nextInt();
			int ki = sc.nextInt();
			int di = sc.nextInt();
			int count = 0;
			current = ti;
			int sum = 0;
			for(int i=1;i<=n;i++){
				if(arr[i]<=current)
					arr[i] = 0;
			}
			for(int i=1;i<=n && count<ki;i++){
				if(arr[i]==0){
					count++;
				}
			}
			if(count!=ki){
				System.out.println("-1");
				continue;
			}
			else{
				count = 0;
				for(int i=1;i<=n && count<ki;i++){
					if(arr[i]==0){
						arr[i] = current+di;
						count++;
						sum+=i;
					}
				}	
			}
			System.out.println(sum);
		}
	}

	static class FastReader
    {
        BufferedReader br;
        StringTokenizer st;
 
        public FastReader()
        {
            br = new BufferedReader(new
                     InputStreamReader(System.in));
        }
 
        String next()
        {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException  e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }
 
        int nextInt()
        {
            return Integer.parseInt(next());
        }
 
        long nextLong()
        {
            return Long.parseLong(next());
        }
 
        double nextDouble()
        {
            return Double.parseDouble(next());
        }			
 
        String nextLine()
        {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
    }
}