#include <bits/stdc++.h>
#define maxn 2003
#define pii pair<ll, ll>
#define tpe tuple<int, int, int>
#define MOD 1000000007
#define ll long long
#define lim 44725
#define file "mind"
#define base 131
using namespace std;
int n, c;
ll d[maxn];
int main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> c >> n;
for(int i = 1; i <= n; i++) {
int w, v, k;
cin >> v >> w >> k;
for(int p = 1; k > 0; p *= 2) {
int cur = min(p, k);
ll new_w = 1ll * w * cur;
ll new_v = 1ll * v * cur;
for(int j = c; j >= new_w; j--)
d[j] = max(d[j], d[j-new_w] + new_v);
k -= cur;
}
}
cout << d[c];
}
