#include <iostream>
#include <vector>
#include <algorithm>
#define int long long
using namespace std;
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int s, n; cin >> s >> n;
vector<int> dp(s + 1, 0);
vector<vector<pair<int, int>>> items(s);
while (n--) {
int v, w, k; cin >> v >> w >> k;
items[w - 1].emplace_back(v, k);
}
for (int i = 1; i <= s; ++i) {
auto &lst = items[i - 1];
sort(lst.rbegin(), lst.rend());
int cur = 0;
for (auto &[v, k] : lst) {
if (cur >= s / i) break;
for (int j = 0; j < min(k, s / i - cur); ++j) {
for (int a = s; a >= i; --a) dp[a] = max(dp[a], dp[a - i] + v);
}
cur += k;
}
}
int res = 0;
for (int i : dp) res = max(res, i);
cout << res << '\n';
return 0;
}
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