#include <bits/stdc++.h>
using namespace std;
#define vi vector<int>
#define fast_io ios_base::sync_with_stdio(false); cin.tie(NULL)
void solve() {
int x, n;
cin >> x >> n;
vi v_temp, c_temp, t_temp;
for (int i = 0; i < n; i++) {
int value, weight, amt;
cin >> value >> weight >> amt;
if (weight <= x && amt > 0) {
v_temp.push_back(value);
c_temp.push_back(weight);
t_temp.push_back(amt);
}
}
n = v_temp.size();
if(n == 0) {
cout << 0;
return;
}
vi v = v_temp, c = c_temp, t = t_temp;
if(n == 1) {
int maxCopies = min(t[0], x / c[0]);
cout << maxCopies * v[0];
return;
}
vector<vi> dp(n + 1, vi(x + 1, 0));
for (int i = n - 1; i >= 0; i--) {
for (int j = 0; j <= x; j++) {
int skip = dp[i + 1][j];
dp[i][j] = skip;
if(t[i]*c[i]>x){
continue;
}
for (int k = 1; k <= t[i] && k*c[i]<=j; k++) {
if (j - k * c[i] >= 0) {
int pick = k * v[i] + dp[i + 1][j - k * c[i]];
dp[i][j] = max(dp[i][j], pick);
}
}
}
}
cout << dp[0][x];
}
int main() {
fast_io;
solve();
return 0;
}
