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.io.*;
import java.util.*;

public class Main {

    public static void main(String[] args) throws Exception {
        Reader in = new Reader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));

        int n = in.nextInt();
        int m = in.nextInt();
        Node[] a = new Node[m];
        int[] servers = new int[n + 1];
        for (int i = 0; i < m; i++) {
            a[i] = new Node();
            a[i].t = in.nextInt();
            a[i].k = in.nextInt();
            a[i].d = in.nextInt();
            a[i].ans = -1;
        }

        for (int i = 0; i < m; i++) {
            int need = a[i].k;
            int sum = 0;
            for (int j = 1; j <= n && need > 0; j++) {
                if (servers[j] <= a[i].t) {
                    need--;
                    sum += j;
                }
            }

            if (need == 0) {
                need = a[i].k;
                for (int j = 1; j <= n && need > 0; j++) {
                    if (servers[j] <= a[i].t) {
                        need--;
                        servers[j] = a[i].d + a[i].t;
                    }
                }
                a[i].ans = sum;
            }
        }

        for (int i = 0; i < m; i++) {
            out.println(a[i].ans);
        }

        out.flush();
        in.close();
        out.close();
    }

    static class Node {
        int t, k, d, ans;
    }

    static class Reader {
        BufferedReader reader;
        StringTokenizer st;

        Reader(InputStreamReader stream) {
            reader = new BufferedReader(stream);
            st = null;
        }

        void close() throws IOException {
            reader.close();
        }

        String next() {
            while (st == null || !st.hasMoreTokens()) {
                try {
                    st = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        String nextLine() throws IOException {
            return reader.readLine();
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

    }
}