#include <bits/stdc++.h>
#define int long long
using namespace std;
int32_t main() {
ios::sync_with_stdio(false);
cin.tie(NULL);
int S, N;
cin >> S >> N;
map<int, vector<int>> weight_groups;
for (int i = 0; i < N; ++i) {
int v, w, k;
cin >> v >> w >> k;
int limit = min(k, S / w);
for (int j = 0; j < limit; ++j) {
weight_groups[w].push_back(v);
}
}
vector<pair<int, int>> final_items;
for (auto& [w, vals] : weight_groups) {
int limit = S / w;
if ((int)vals.size() > limit) {
nth_element(vals.begin(), vals.begin() + limit, vals.end(), greater<>());
vals.resize(limit);
}
for (int v : vals) {
final_items.emplace_back(w, v);
}
}
vector<int> dp(S + 1, 0);
for (auto& [w, v] : final_items) {
for (int j = S; j >= w; --j) {
dp[j] = max(dp[j], dp[j - w] + v);
}
}
cout << dp[S] << '\n';
return 0;
}
