#include <bits/stdc++.h>
using namespace std;
#define ll long long
int main() {
ios_base::sync_with_stdio(false); cin.tie(NULL);
// freopen("Knapsack.in", "r", stdin);
// freopen("Knapsack.out", "w", stdout);
int limit, type_num;
cin >> limit >> type_num;
vector<vector<int>> items(type_num, vector<int>(3));
for (int i = 0; i < type_num; i++) {
int weight, num, val;
cin >> val >> weight >> num;
if (weight>limit) continue;
items[i][0] = weight; items[i][1] = num; items[i][2] = val;
}
vector<ll> dp(limit+1, -1l);
dp[0]= 0;
int dylimit=0;
for (int t=0; t<type_num; t++) {
int weight, num, val;
weight = items[t][0]; num = items[t][1]; val = items[t][2];
for (int i= min(limit - weight, dylimit); i>=0; i--) {
if (dp[i]>=0) {
for (int k=num; k >=0 && i+k*weight <= limit; k--) {
dp[i+k*weight] = max(dp[i+k*weight], dp[i] + k*val);
dylimit = max(dylimit, i+k*weight );
}
}
}
}
cout << *max_element(dp.begin(), dp.end()) << endl;
}
