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 Servers {
    public static InputReader in;
    public static PrintWriter out;

    public static final int MOD = (int) (1e9 + 7);

    public static void main(String[] args) {
	in = new InputReader(System.in);
	out = new PrintWriter(System.out);
	
	int n = in.nextInt(), q = in.nextInt();
	//double starttime = System.currentTimeMillis();
	int max = 1001005;
	int[] start = new int[max];
	ArrayList<Integer>[] end = new ArrayList[max];
	for (int i = 0; i < max; i++) {
	    end[i] = new ArrayList<Integer>();
	}
	ArrayList<Integer>[] allotted = new ArrayList[max];
	for (int i = 0; i < max; i++) {
	    allotted[i] = new ArrayList<Integer>();
	}
	
	TreeSet<Integer> free = new TreeSet<Integer>();
	for (int i = 1; i <= n; i++) {
	    free.add(i);
	}
	int[] k = new int[q + 1];
	for (int i = 1; i <= q; i++) {
	    int ti = in.nextInt(), ki = in.nextInt(), di = in.nextInt();
	    start[ti] = i;
	    end[ti + di].add(i);
	    k[i] = ki;
	}
	
	long[] ans = new long[q + 1];
	for(int t = 1; t < max; t++) {
	    for(Integer ii : end[t]) {
		for(Integer x : allotted[ii]) {
		    free.add(x);
		}
		allotted[ii] = new ArrayList<Integer>();
	    }
	    end[t] = new ArrayList<Integer>();
	    
	    if(start[t] == 0) {
		continue;
	    }
	    
	    int qi = start[t];
	    int need = k[qi];
	    if(need <= free.size()) {
		long sum = 0;
		for(Integer x : free) {
		    allotted[qi].add(x);
		    sum += x;
		    need--;
		    if(need <= 0) {
			break;
		    }
		}
		for(Integer x : allotted[qi]) {
		    free.remove(x);
		}
		ans[qi] = sum;
	    } else {
		ans[qi] = -1;
	    }
	}
	for(int i = 1; i <= q; i++) {
	    out.println(ans[i]);
	}
	//out.println();
	//out.println(System.currentTimeMillis() - starttime);

	out.close();
    }

    static class Node implements Comparable<Node> {
	int next;
	int dist;

	public Node(int u, int v) {
	    this.next = u;
	    this.dist = v;
	}

	public void print() {
	    out.println(next + " " + dist + " ");
	}

	public int compareTo(Node that) {
	    return Integer.compare(this.next, that.next);
	}
    }

    static class InputReader {

	private InputStream stream;
	private byte[] buf = new byte[8192];
	private int curChar, snumChars;
	private SpaceCharFilter filter;

	public InputReader(InputStream stream) {
	    this.stream = stream;
	}

	public int snext() {
	    if (snumChars == -1)
		throw new InputMismatchException();
	    if (curChar >= snumChars) {
		curChar = 0;
		try {
		    snumChars = stream.read(buf);
		} catch (IOException e) {
		    throw new InputMismatchException();
		}
		if (snumChars <= 0)
		    return -1;
	    }
	    return buf[curChar++];
	}

	public int nextInt() {
	    int c = snext();
	    while (isSpaceChar(c))
		c = snext();
	    int sgn = 1;
	    if (c == '-') {
		sgn = -1;
		c = snext();
	    }
	    int res = 0;
	    do {
		if (c < '0' || c > '9')
		    throw new InputMismatchException();
		res *= 10;
		res += c - '0';
		c = snext();
	    } while (!isSpaceChar(c));
	    return res * sgn;
	}

	public long nextLong() {
	    int c = snext();
	    while (isSpaceChar(c))
		c = snext();
	    int sgn = 1;
	    if (c == '-') {
		sgn = -1;
		c = snext();
	    }
	    long res = 0;
	    do {
		if (c < '0' || c > '9')
		    throw new InputMismatchException();
		res *= 10;
		res += c - '0';
		c = snext();
	    } while (!isSpaceChar(c));
	    return res * sgn;
	}

	public int[] nextIntArray(int n) {
	    int a[] = new int[n];
	    for (int i = 0; i < n; i++)
		a[i] = nextInt();
	    return a;
	}

	public String readString() {
	    int c = snext();
	    while (isSpaceChar(c))
		c = snext();
	    StringBuilder res = new StringBuilder();
	    do {
		res.appendCodePoint(c);
		c = snext();
	    } while (!isSpaceChar(c));
	    return res.toString();
	}

	public boolean isSpaceChar(int c) {
	    if (filter != null)
		return filter.isSpaceChar(c);
	    return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
	}

	public interface SpaceCharFilter {
	    public boolean isSpaceChar(int ch);
	}
    }
}
