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 sys import stdin,stdout,setrecursionlimit,maxint,exit
#setrecursionlimit(10**5)
def listInput():
 return map(long,stdin.readline().split())
def printBS(li):
 for i in xrange(len(li)-1):
  stdout.write("%d "%li[i])
 stdout.write("%d\n"%li[-1])
def sin():
 return stdin.readline().rstrip()
def su(i):
 return (i*(i+1))/2
n,q=listInput()
serv=0
t=1
req=[[] for i in xrange(10**6+1)]
rel=[0]*(10**6+1)
for i in xrange(q):
 a,b,c=listInput()
 req[a].append((b,c))
print req[:10]
print rel[:10]
for i in xrange(1,10**2+1):
 for j,c in req[i]:
  if j<=n-serv:
   #print "s:",serv
   print su(serv+j)-su(serv)
   serv+=j
   rel[i+c-1]+=j
  else: print -1
 serv-=rel[i]