#include <bits/stdc++.h>
using namespace std;
#define sz size()
#define nah "No\n"
#define yeah "Yes\n"
#define F first
#define S second
#define int long long
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
const int inf=1e13;
const int N=100000+23;
const int mod=1e9+7;
int dp[2001*2001],w[N],c[N],a[N];
signed main() {
ios_base::sync_with_stdio(false);cin.tie(nullptr);
// freopen("snakes.in","r",stdin);
// freopen("snakes.out","w",stdout);
int n,k;
cin>>k>>n;
vector<pair<int,int>>v;
for(int i=1;i<=n;i++) {
cin>>c[i]>>w[i]>>a[i];
if(w[i]>k){
continue;
}
int sum=w[i];
while(sum<=k && a[i]--) {
v.pb({w[i],c[i]});
sum+=w[i];
}
}
for(auto [weight,val]:v) {
for(int j=k;j>=weight;j--) {
dp[j]=max(dp[j],dp[j-weight]+val);
}
}
int ans=-inf;
for(int i=1;i<=k;i++) {
ans=max(ans,dp[i]);
}
cout<<ans;
}
