#include <bits/stdc++.h>
using namespace std;
// Shortcuts for common operations
#define pb push_back
#define ppb pop_back
#define f first
#define s second
#define all(x) (x).begin(), (x).end()
#define ll long long
#define endl "\n"
// Type definitions for convenience
typedef vector<int> vi;
typedef vector<bool> vb;
typedef pair<int, int> pii;
typedef vector<vi> vvi;
typedef vector<pii> vii;
typedef unordered_set<int> usi;
typedef unordered_map<int, int> umii;
// Debugging macros
#define debug(x) cerr << #x << " = " << (x) << '\n'
#define debug_vector(v) _debug_vector(#v, v)
template<typename T>
void _debug_vector(const string& name, const vector<T>& a) {
cerr << name << " = [ ";
for(const auto &x : a) cerr << x << ' ';
cerr << "]\n";
}
// I/O redirection for local testing
#define iofile(io) \
freopen((io + ".in").c_str(), "r", stdin); \
freopen((io + ".out").c_str(), "w", stdout);
// delta for floodfill
vi dx = {0, 1, 0, -1};
vi dy = {1, 0, -1, 0};
// extended deltas for floodfill
vi edx = {0, 1, 0, -1, 1, 1, -1, -1};
vi edy = {1, 0, -1, 0, 1, -1, 1, -1};
// Common outputs
void yes() { cout << "YES" << '\n'; }
void no() { cout << "NO" << '\n'; }
// cin.tie(0)->sync_with_stdio(0);
void fx() {
// Functionality for fx
int s, n;
cin >> s >> n;
map<int, vii>tab;
vector<ll>total(2001, 0);
for(int i = 0; i < n; i++){
int v, w, k;
cin >> v >> w >> k;
tab[w].pb({v, k});
total[w] += k;
}
for(auto &i: tab) sort(all((i).s)), reverse(all((i).s));
int us = tab.size();
vector<vector<ll>>dp(us+5, vector<ll>(s+10, 0));
int curr = 1;
for(auto &i: tab){
for(int take = 0; take <= min(total[i.f], 2000LL); take++){
if(take * i.f > s) break;
ll value = 0;
int rem = take;
int temp = 0;
while(rem){
int localTake = min((i.s)[temp].s, rem);
value += localTake * (i.s)[temp].f;
temp++;
rem -= localTake;
}
for(int j = s; j >= take * i.f; j--) dp[curr][j] = max(dp[curr][j], dp[curr-1][j - take * i.f] + value);
}
curr++;
}
cout << *max_element(all(dp[n-1])) << endl;
}
int main() {
// Uncomment the following lines for file I/O
// iofile(string("hello"));
// Uncomment the following lines for multiple test cases
// int t; cin >> t;
// while(t--) fx();
// Single test case
fx();
return 0;
}
