//#pragma GCC optimize("03,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
// Shortcuts for common operations
#define pb push_back
#define p push
#define ppb pop_back
#define f first
#define s second
#define all(x) (x).begin(), (x).end()
#define ll long long
//#define int ll
#define endl "\n"
#define sz(x) (int)x.size()
// Type definitions for convenience
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<bool> vb;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<vi> vvi;
typedef vector<pii> vii;
// 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'; }
void fx() {
int s, n;
cin >> s >> n;
vector<array<int, 3>>orders(n); // (value, weight, copies)
for(int i = 0; i < n; i++) cin >> orders[i][0] >> orders[i][1] >> orders[i][2];
sort(all(orders));
reverse(all(orders));
unordered_map<int, vii>stuff;
for(int i = 0; i < n; i++) stuff[orders[i][1]].pb({orders[i][0], orders[i][2]});
vll dp(s+1, 0);
for(const auto &[weight, list]: stuff){
int tillSum = 0;
for(const auto &[value, copies] : list){
for(int copy = 1; copy <= copies; copy++){
tillSum += weight;
if(tillSum > s) break;
for(int i = s - weight; i >= 0; i--) dp[i+weight] = max(dp[i+weight], dp[i] + value);
}
}
}
cout << *max_element(all(dp)) << endl;
}
signed main() {
cin.tie(0)->sync_with_stdio(0);
// 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;
}
