#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
#define fast ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0)
#define exit return 0
#define cap pair<int,int>
#define fi first
#define se second
#define pb push_back
#define FOR(i,l,r) for(int i=l;i<=r;i++)
#define FOD(i,r,l) for(int i=r;i>=l;i--)
#define fill(f,x) memset(f,x,sizeof(f))
#define lcm(a,b) (a/__gcd(a,b)*b)
#define TIME 1.0 * clock() / CLOCKS_PER_SEC
priority_queue<cap> q[20005];
int dp[2000005];
signed main()
{
fast;
int n,s;
cin>>s>>n;
FOR(i,1,n)
{
int v,w,k;
cin>>v>>w>>k;
q[w].push({v,k});
}
vector<cap> v;
FOR(i,1,s)
{
int max_choose=s/i;
while(!q[i].empty() && max_choose)
{
cap tmp=q[i].top();
q[i].pop();
int val=tmp.first;
int sl=tmp.second;
sl=min(sl,max_choose);
FOR(j,1,sl) v.push_back({i,val});
max_choose-=sl;
}
}
FOR(i,0,v.size()-1)
{
int w=v[i].first;
int val=v[i].second;
FOD(j,s,1)
{
if(w<=j) dp[j]=max(dp[j],dp[j-w]+val);
}
}
cout<<dp[s];
exit;
}
/*
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*/
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