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

from copy import copy
def sum(k,w,n):
    return (2*n-2*w+k+1)*(k)//2
def refresh(dt):
    global s,w
    e=[]
    for i in range(len(s)):
        s[i][0] -= dt
        if s[i][0] <= 0:
            w += s[i][1]
            e.append(s[i])
    for x in e:
        s.remove(x)
n,q=map(int,input().split(' '))
s=[]
w=copy(n)
tt=0
for i in range(q):
    t,k,d=map(int,input().split())
    dt=t-tt
    refresh(dt)
    if k<=w:
        s.append([d,k])
        print(sum(k,w,n))
        w-=k
    else:
        print(-1)
    tt=copy(t)

