/*
* * author: attacker
* * created: 27.01.2026 16:54:50
*/
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) 42
#endif
#define mt_rng mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int n;
int64_t lim;
cin >> lim >> n;
vector<int64_t> v;
vector<int64_t> w;
for (int i = 0; i < n; i++) {
int64_t cur_v, cur_w;
int cnt;
cin >> cur_v >> cur_w >> cnt;
for (int id = 0; id < cnt; id++) {
v.push_back(cur_v);
w.push_back(cur_w);
}
}
const int64_t inf = int64_t(1e18);
vector<int64_t> dp(lim + 1, -inf);
dp[0] = 0;
for (int i = 0; i < n; i++) {
for (int64_t j = lim; j >= w[i]; j--) {
dp[j] = max(dp[j], dp[j - w[i]] + v[i]);
}
}
cout << dp[lim] << '\n';
return 0;
}
