//Hoshino is my wife UwU
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<long long, long long> vll;
typedef vector<int, int> vii;
#define a_all(x) x + 1, x + 1+ n
#define all(x) x.begin(), x.end()
#define sz(x) x.size()
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define file "test"
const int N = 1e6 + 5;
const ll inf = 1e18;
const int MID = 1e9 + 7;
const int NN = 5e3 + 5;
ll n, s, w[N], v[N], k[N], dp[N];
vector<pii> sigmaboi[N];
vector<int> wei;
void sub1(){
if (w[1] <= s){
ll l = 1, r = k[1], mid, rs = 0;
for (int i=1;i<=100;i++){
mid = (l + r)/2;
if (mid * w[1] <= s) l = mid + 1;
else r = mid - 1;
}
cout << v[1] * mid;
exit(0);
}
}
//void sub23(){
// for (int i=1;i<=n;i++){
// for (int j=s;j>=w[i];j--){
// for (int u=1;u<=k[i];u++){
// if (j-w[i]*u >= 0) dp[j] = max(dp[j-w[i]*u] + v[i]*u, dp[j]);
// }
// }
// }
// cout << dp[s];
// exit(0);
//}
void sub45(){
for (int i=1;i<=n;i++){
wei.pb(w[i]);
sigmaboi[w[i]].pb({v[i], k[i]});
}
sort(all(wei));
for (auto x: wei){
sort(all(sigmaboi[x]), greater<pii>());
for (int j=s;j>=x;j--){
int id = 0, curr = 1, cnt =0;
while ((cnt + 1) * x <= j && id < sigmaboi[x].size()){
cnt ++;
// cout << j << ' ' << id << ' ' << x << ' ' << cnt << ' ' << curr << endl;
dp[j] = max(dp[j], dp[j - cnt*x] + cnt * sigmaboi[x][id].fi);
curr ++;
if (curr >= sigmaboi[x][id].se){
curr = 1;
id ++;
}
}
}
}
// for (int i=0;i<=s;i++){
// cout << dp[i] << ' ';
// }
cout << dp[s];
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
// freopen(file".inp", "r", stdin);
// freopen(file".out", "w", stdout);
cin >> s >> n;
ll mx = 0;
for (int i=1;i<=n;i++){
cin >> v[i] >> w[i] >> k[i];
mx = max(mx, k[i]);
}
if (n == 1) sub1();
if (n <= 100 && mx <= 100) sub23();
sub45();
return 0;
}
//⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣤⡤⠤⠤⠤⣤⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡤⠞⠋⠁⠀⠀⠀⠀⠀⠀⠀⠉⠛⢦⣤⠶⠦⣤⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠀⠀⠀⠀⠀⠀⢀⣴⠞⢋⡽⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠃⠀⠀⠙⢶⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠀⠀⠀⠀⠀⣰⠟⠁⠀⠘⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⡀⠀⠀⠉⠓⠦⣤⣤⣤⣤⣤⣤⣄⣀⠀⠀⠀
//⠀⠀⠀⠀⣠⠞⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣴⣷⡄⠀⠀⢻⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣆⠀
//⠀⠀⣠⠞⠁⠀⠀⣀⣠⣏⡀⠀⢠⣶⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠹⠿⡃⠀⠀⠀⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⡆
//⢀⡞⠁⠀⣠⠶⠛⠉⠉⠉⠙⢦⡸⣿⡿⠀⠀⠀⡄⢀⣀⣀⡶⠀⠀⠀⢀⡄⣀⠀⣢⠟⢦⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⠃
//⡞⠀⠀⠸⠁⠀⠀⠀⠀⠀⠀⠀⢳⢀⣠⠀⠀⠀⠉⠉⠀⠀⣀⠀⠀⠀⢀⣠⡴⠞⠁⠀⠀⠈⠓⠦⣄⣀⠀⠀⠀⠀⣀⣤⠞⠁⠀
//⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⠀⠁⠀⢀⣀⣀⡴⠋⢻⡉⠙⠾⡟⢿⣅⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠉⠙⠛⠉⠉⠀⠀⠀⠀
//⠘⣦⡀⠀⠀⠀⠀⠀⠀⣀⣤⠞⢉⣹⣯⣍⣿⠉⠟⠀⠀⣸⠳⣄⡀⠀⠀⠙⢧⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠈⠙⠒⠒⠒⠒⠚⠋⠁⠀⡴⠋⢀⡀⢠⡇⠀⠀⠀⠀⠃⠀⠀⠀⠀⠀⢀⡾⠋⢻⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⡇⠀⢸⡀⠸⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠀⠀⢠⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣇⠀⠀⠉⠋⠻⣄⠀⠀⠀⠀⠀⣀⣠⣴⠞⠋⠳⠶⠞⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠳⠦⢤⠤⠶⠋⠙⠳⣆⣀⣈⡿⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
//⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
