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.*;
public class TestClass {
	
	static PrintWriter out = new PrintWriter(System.out);
	public static void main(String args[] ) throws Exception {
        
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String s[] = in.readLine().split(" ");
        int n = Integer.parseInt(s[0]);
        int m = Integer.parseInt(s[1]);
        int a[] = new int[n];
        for(int i=0;i<m;i++)
        {
        	String s1[] = in.readLine().split(" ");
        	int p = Integer.parseInt(s1[0]);
        	int q = Integer.parseInt(s1[1]);
        	int r = Integer.parseInt(s1[2])+p-1;
        	int c=0,f=0,sum=0;
        	for(int j=0;j<n;j++)
        	{
        		if(a[j]<p)
        		{
        			c++;
        		}
        		if(c==q)
        		{
        			f=1;
        			break;
        		}
        	}
        	c=0;
        	if(f==1)
        	{
        		for(int j=0;j<n;j++)
        		{
        			if(a[j]<p)
        			{
        				c++;
        				a[j] = r;
        				sum+=j+1;
        			}
        			if(c==q)
            		{
            			break;
            		}
        		}
        		out.println(sum);
        	}
        	else
        	{
        		out.println(-1);
        	}
        }
        out.close();
    }
	
	
    
  
}


