#include <bits/stdc++.h>
using namespace std;
#define int long long
void solve() {
int s, n;
cin >> s >> n;
vector<int> values(n);
vector<int> weights(n);
vector<int> copies(n);
for (int i = 0; i < n; i++) {
cin >> values[i] >> weights[i] >> copies[i];
copies[i] = min(copies[i], s);
}
vector<int> dp(s+5, -1);
dp[0] = 0;
vector<vector<int>> mod_table(s+1);
for (int i = 0; i < n; i++) {
for (int j = s-weights[i]; j >= 0; j--) {
if (dp[j] != -1) {
for (int k = 0; k < copies[i] && j + (k+1)*weights[i] <= s; k++) {
dp[j+(k+1)*weights[i]] = max(dp[j+(k+1)*weights[i]], dp[j] + (k+1)*values[i]);
}
}
}
}
int ans = *max_element(dp.begin(), dp.end());
cout << ans << "\n";
};
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}
