#include <bits/stdc++.h> using namespace std; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using vi = vector<int>; #define all(x) (x).begin(), (x).end() int main() { cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0); ll s, n; cin >> s >> n; vector<ll> v(n), w(n), k(n); for (ll i = 0; i < n; ++i) { cin >> v[i] >> w[i] >> k[i]; } vector<vector<ll>> dp(2, vector<ll>(s + 1)); for (ll i = 0; i < n; ++i) { for (ll r= 0; r < w[i]; ++r) { queue<ll> q; ll added = 0, removed = 0; for (ll a = 0; a * w[i] + r <= s; ++a) { while (!q.empty() && q.front() < dp[(i + 1) & 1][a * w[i] + r] - v[i] * a) { q.pop(); removed++; } while (added - removed > k[i]) { q.pop(); removed++; } q.push({dp[(i + 1) & 1][a * w[i] + r] - v[i] * a}); added++; dp[i & 1][a * w[i] + r] = q.front() + a * v[i]; } } } cout << dp[(n + 1) & 1][s] << '\n'; return 0; }