1 #include <cstdio>
 2 #include <algorithm>
 3 #include <iostream>
 4 #include <cstring>
 5 #include <string>
 6 #include <cmath>
 7 #include <queue>
 8 #include <vector>
 9 #include <map>
10 #include <set>
11 using namespace std;
12 #define INF 0x3f3f3f3f
13 #define N 100010
14 typedef long long LL;
15 int t[N], d[N], k[N];
16 LL ser[105], tmp[105];
17 
18 int main() {
19     int n, q, k, t, d;
20     memset(ser, 0, sizeof(ser));
21     memset(tmp, 0, sizeof(tmp));
22     cin >> n >> q;
23     for(int i = 1; i <= q; i++) {
24         scanf("%d%d%d", &t, &k, &d);
25         int cnt = 0, ans = 0;
26         memcpy(tmp, ser, sizeof(tmp));
27         for(int j = 1; j <= n && cnt < k; j++) {
28             if(tmp[j] <= t) {
29                 cnt++; tmp[j] = t + d;
30                 ans += j;
31             }
32         }
33         if(cnt < k) {
34             printf("-1\n");
35         } else {
36             memcpy(ser, tmp, sizeof(ser));
37             printf("%d\n", ans);
38         }
39     }
40     return 0;
41 }