#include <bits/stdc++.h>
#define int int64_t
using ll = int64_t;
using namespace std;
constexpr int maxn = 1E5 + 1;
void orz() {
int s, n;
cin >> s >> n;
vector <int> v = {0}, w = {0};
for(int i = 1; i <= n; i++ ){
int V, W, K;
cin >> V >> W >> K;
for(int j = 1; j <= min(s, K); j++){
v.push_back(V);
w.push_back(W);
}
}
vector <int> dp(s + 61, LLONG_MIN);
dp[0] = 0;
n = v.size() - 1;
for(int i = 1; i <= n; i++) {
for(int j = s; j >= w[i]; j--) {
dp[j] = max(dp[j], dp[j - w[i]] + v[i]);
}
}
cout << *max_element(dp.begin(), dp.end());
}
int32_t main() {
ios_base::sync_with_stdio(false), cin.tie(nullptr);
//freopen("promote.in", "r", stdin);
//freopen("promote.out", "w", stdout);
int T = 1;
//cin >> T;
while(T--) orz();
return 0;
}
