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 = [int(i) for i in input().split()]
summ1, summ2 = 0,0
s = [0]*n[0]
time = 0
for i in range(n[1]):
	inp = [int(j) for j in input().split()]
	for j in range(1,n[0]+1):
		if s[j-1]:
			s[j-1] -= inp[0]-time
			if s[j-1] < 0:
				s[j-1] = 0
		if not s[j-1]:
			summ1 += 1
	if summ1 >= inp[1]:
		for j in range(1,n[0]+1):
			if not s[j-1]:
				s[j-1] = inp[2]
				summ2 += j
				inp[1] -= 1
			if not inp[1]:
				break
		print(summ2)
	else:
		print(-1)
	print('	time=',time)
	time = inp[0]
	print('	s..=',s,summ2,summ1)
	print('	time=',time)
	summ2, summ1 = 0,0
	