#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define _ << " " <<
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define ull unsigned long long
#define lll __int128
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define BlueCrowner ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define FOR(i, a, b) for (ll i = (a); i < (b); i++)
#define FORD(i, a, b) for (ll i = (a); i >= (b); i--)
const ll mod = 1e9 + 7;
void solve() {
ll s, n; cin >> s >> n;
vector<ll> dp(s + 1, 0);
FOR(i, 0, n) {
ll v, w, k; cin >> v >> w >> k;
FORD(j, s, 0) {
FOR(freq, 1, k + 1) {
if(j + freq * w <= s)
if(dp[j + freq * w] >= dp[j] + freq * v) break;
else dp[j + freq * w] = dp[j] + freq * v;
else break;
}
}
}
cout << dp[s] << '\n';
}
int main() {
BlueCrowner;
ll t = 1;
//cin >> t;
while (t--) {
solve();
}
return 0;
}
