#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define in insert
#define lb lower_bound
#define F first
#define S second
#define sz size()
#define all(v) v.begin(),v.end()
#define FOR1(x, n) for(int j = x; j <= n; j ++)
#define FOR(x, n, m, d) for(int x = n; x <= m; x += d)
#define FORR(x, n, m, d) for(int x = n; x >= m; x -= d)
#define nikita ios_base::sync_with_stdio(0), cin.tie(0);
const int N = 1e5+5;
int n,m,k,sum=0,x,y, ans, r, cnt, l, mod = 1e9+7;
string s, str;
void solve(){
cin >> m >> n;
vector<vector<int>> dp(n+1,vector<int>(m+1,0));
ans = 0;
FOR(ok,1,n,1){
int cost, worth, skoka;
cin >> cost >> worth >> skoka;
int i = ok;
FOR(j, 1, m, 1){
dp[i][j] = dp[i-1][j];
if( worth <= j ){
k = skoka;
k = min(k, m);
while(k){
if(j >= worth*k)dp[i][j] = max(dp[i][j], dp[i-1][j-worth*k] + cost * k);
k --;
}
}
ans=max(ans, dp[i][j]);
}
}
cout << ans;
}
signed main(){
nikita
int tt = 1;
if(!tt)cin >> tt;
FOR(i, 1, tt, 1)solve();
}
