#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <unordered_set>
#include <unordered_map>
#include <set>
#include <algorithm>
#include <cctype>
#include <limits>
#include <iomanip>
#include <stack>
#include <numeric>
#include <map>
#include <queue>
#include <cfloat>
#include <climits>
using namespace std;
using ll = long long;
using ull = unsigned long long;
const ll MOD = 1e9 + 7;
const ll MAX_SAFE_LL = 1e18;
const ll INF = 1e9;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int S, N;
cin >> S >> N;
vector<vector<pair<int,int>>> items(S + 1);
for(int i = 0; i < N; ++i) {
int V, W, K;
cin >> V >> W >> K;
if(W > S) continue;
K = min(K, S / W);
items[W].emplace_back(V, K);
}
vector<ll> dp(S + 1, 0);
for(int w = 1; w <= S; ++w) {
if(items[w].empty()) continue;
sort(items[w].rbegin(), items[w].rend());
for(auto [V, K] : items[w]) {
for(int j = S; j >= w; --j) {
int take = min(K, j / w);
for(int k = 1; k <= take; ++k) {
dp[j] = max(dp[j], dp[j - k*w] + 1LL*V*k);
}
}
}
}
cout << dp[S] << "\n";
return 0;
}
