#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define all(v) v.begin(), v.end()
#define endl '\n'
#define pl(var) " [" << #var << ": " << (var) << "] "
#define value 0
#define weight 1
#define number 2
ll int mod = 1e9 + 7;
void solve() {
ll int s, n; cin >> s >> n;
vector<array<ll int, 3>> arr(n);
for (int i = 0; i < n; i++) {
cin >> arr[i][0] >> arr[i][1] >> arr[i][2];
}
vector<ll int> dp(s + 1, 0);
for (int i = 0; i < n; i++) {
for (int j = s; j >= 1; j--) {
ll int cur = 1;
while ((j - (arr[i][weight] * cur)) >= 0 && cur <= arr[i][number]) {
dp[j] = max(dp[j], dp[j - arr[i][weight] * cur] + arr[i][value] * cur);
cur++;
}
}
}
cout << dp[s] << endl;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
// int t; cin >> t;
// while (t--)
solve();
return 0;
}
