#ifndef Local
#pragma GCC optimize("O3,unroll-loops")
#endif
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define lim 100000
using namespace std;
const int mod=1000000007ll;
void solve(){
int s,n;
cin>>s>>n;
priority_queue<pair<int,int>>weight[s+1];
for(int i=0;i<n;i++){
int v,w,k;
cin>>v>>w>>k;
weight[w].push({v,k});
}
int dp[s+1];
memset(dp,0,sizeof(dp));
for(int i=1;i<=s;i++){
int cani=s/i;
while(cani&&weight[i].size()){
auto p=weight[i].top();
weight[i].pop();
if(p.second<cani){
for(int rep=0;rep<p.second;rep++){
for(int j=s-i;0<=j;j--){
dp[j+i]=max(dp[j+i],dp[j]+p.first);
}
}
cani-=p.second;
}else{
for(int rep=0;rep<cani;rep++){
for(int j=s-i;0<=j;j--){
dp[j+i]=max(dp[j+i],dp[j]+p.first);
}
}
cani=0;
}
}
}
cout<<*max_element(dp,dp+s+1);
}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);cout.tie(NULL);
#ifdef Local
freopen(".in","r",stdin);
freopen(".out","w",stdout);
#endif
int t=1;
//cin>>t;
while (t--)
{
solve();
}
}
