#include <bits/stdc++.h>
using namespace std;
#define fastio ios_base::sync_with_stdio(false);cin.tie(0); cout.tie(0);
#define pb push_back
int main() {
fastio
int S, N;
cin >> S >> N;
vector<int> weights, values;
for (int i = 0; i < N; i++) {
int v, w, k;
cin >> v >> w >> k;
// Binary decomposition
for (int j = 1; k > 0; j <<= 1) {
int cnt = min(j, k);
weights.pb(cnt * w);
values.pb(cnt * v);
k -= cnt;
}
}
// Standard 0/1 knapsack on decomposed items
vector<int> dp(S + 1, 0);
for (int i = 0; i < weights.size(); i++) {
for (int j = S; j >= weights[i]; j--) {
dp[j] = max(dp[j], dp[j - weights[i]] + values[i]);
}
}
cout << dp[S] << '\n';
return 0;
}
