/**
* author: daotuankhoi
* created: 29.09.2024 20:25:04
**/
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) 42
#endif
int64_t dp[200005];
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int n, m; cin >> m >> n;
vector<int64_t> we(1), va(1);
for (int i = 1; i <= n; i++) {
int64_t w, v, a;
cin >> v >> w >> a;
int64_t bit = 1;
while (bit <= a) {
we.emplace_back(w * bit);
va.emplace_back(v * bit);
a -= bit;
bit <<= 1;
}
if (a > 0) {
we.emplace_back(w * a);
va.emplace_back(v * a);
}
}
for (int i = 1; i < we.size(); i++) {
for (int j = m; j >= we[i]; j--) {
dp[j] = max(dp[j], dp[j - we[i]] + va[i]);
}
}
cout << dp[m];
return 0;
}
