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

#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
const long long inf = 1e18 + 5;
const long long SZ = 2e5 + 5;
long long gcd(long long a, long long b) { return b ? gcd(b, a % b) : a; }
long long lcm(long long a, long long b) { return a * b / gcd(a, b); }
long long leastbit(long long a) { return a & (-a); }
long long C(int a, int b) {
  long long res = 1;
  for (int i = 0; i < b; i++) res = res * (a - i) / (i + 1);
  return res;
}
long long powmod(long long a, long long b) {
  if (b == 0) return 1;
  long long cnt = powmod(a, b / 2);
  (cnt *= cnt) %= mod;
  if (b & 1) {
    (cnt *= a) %= mod;
  }
  return cnt;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(NULL);
  cout.tie(NULL);
  int n, q, arr[105] = {}, pre = 0;
  cin >> n >> q;
  while (q--) {
    int t, k, d, cnt = 0, sum = 0;
    cin >> t >> k >> d;
    for (int i = 0; i < n; i++) {
      arr[i] = max(0, arr[i] - (t - pre));
      if (!arr[i]) cnt++;
    }
    if (cnt < k) {
      cout << -1 << endl;
    } else {
      cnt = k;
      for (int i = 0; i < n && cnt; i++) {
        if (!arr[i]) {
          arr[i] += d;
          sum += i + 1;
          cnt--;
        }
      }
      cout << sum << endl;
    }
    pre = t;
  }
  return 0;
}
