#include <bits/stdc++.h>
// #ifndef ONLINE_JUDGE
// #include <debug.h>
// #else
// #define debug(...)
// #endif
#define GOOD_LUCK ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
// #define int long long
#define endl "\n"
#define ff first
#define ss second
#define pb push_back
#define all(v) v.begin(), v.end()
using namespace std;
constexpr int MAX = 2e+5 + 1, INF = 2e+9, MOD = 1e+9 + 7, K = 31;
void _() {
int s, n;
cin >> s >> n;
vector <array <int, 3>> v(n);
for (auto &i : v) cin >> i[0] >> i[1] >> i[2];
vector <int> dp(s+1, -INF);
dp[0] = 0;
for (int i = 0; i < n; i++) {
vector <int> ndp = dp;
for (int j = 0; j <= s; j++) {
for (int z = 0; z <= v[i][2]; z++) {
if (j + z * v[i][1] > s) break;
ndp[j + z * v[i][1]] = max(ndp[j + z * v[i][1]], dp[j] + z * v[i][0]);
}
}
dp.swap(ndp);
}
cout << *max_element(all(dp));
}
signed main() {
GOOD_LUCK
int tests=1;
// cin >> tests;
for (int i=1; i <= tests; i++) {
_();
cout << endl;
}
return 0;
}
