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

n,q = map(int,raw_input().split(' '))
#c = [[] for i in range(1000005)]
c = [[],[]]
off = [True for i in range(n+1)]
head = 1
now = n
q_=q
while (q>0):
    if(q_-q)>50000:
        break
    t,k,d = map(int,raw_input().split(' '))
    while(head<=t):
        len_c = len(c[head])
        for j in range(len_c):
            off[c[head][j]] = True
        now += len_c
        head += 1
        c.append([])
    if(now<k):
        print('-1')
    else:
        now -= k
        s=0
        cnt=0
        for i in range(1,n+1):
            if(off[i]):
                off[i]=False;
                s += i
                if(t+d<=1000000):
                    while(len(c)-1<t+d):
                        c.append([])
                    c[t+d].append(i)
                cnt+=1
                if(cnt==k):
                    break
        print(s)    
    q -= 1