#include <bits/stdc++.h>
#define nn '\n'
#define int long long
#define pb push_back
#define all(x) x.begin(), x.end()
#define sec second
#define vec std::vector
using namespace std;
const int N = 2005;
vec<pair<int, int>> p;
int dp[N];
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int n, m ;
cin >> n >> m;
int ans = 0;
int ok = 0;
if(m == 1)
{
int a, b, c;
cin >>a >> b >> c;
while(n > 0 && c > 0)
{
if(n < b)
{
break;
}
n-=b;
ans+=a;
c--;
}
cout << ans;
}
else
{
for (int i = 0; i < m; i++) {
int a, b, c;
cin >> a>> b >> c;
while(c--)
{
p.pb({a, b});
}
}
for(auto [v, w] : p) {
for (int j = n ; j >= w; j--) {
dp[j] = max(dp[j], dp[j - w] + v);
}
}
int ans = 0;
for (int i = 1; i <= n; i++) {
ans = max(ans, dp[i]);
}
cout << ans;
}
}
