#include<bits/stdc++.h>
using namespace std;
#define all(x) x.begin(),x.end()
#define fi first
#define se second
#define pb push_back
#define sp <<' '<<
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vll;
typedef vector<bool> vb;
#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)
#define RFOR(i,a) for(int i=(a);i>=0;i--)
#define contp(a) for(auto el:a) {cout<<el.fi<<'-'<<el.se<<' ';}cout<<endl
#define cont(a) for(auto el:a) {cout<<el<<' ';}cout<<endl
const int MAXN=1e5+2;
const int MAXS=2e3+2;
int dp[MAXS];
set<pii,greater<pii>> say[MAXS][MAXS]; //say[i][j][x]=y;
//i. weightte j.weigthe x.valuda olan elemandan y tane var
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n,mxw;
cin>>mxw>>n;
vi v(n+1);
vi w(n+1);
vi k(n+1);
FOR(i,n){
cin>>v[i+1]>>w[i+1]>>k[i+1];
}
FOR(i,n){
say[0][w[i+1]].insert({v[i+1],k[i+1]});
}
dp[0]=0;
int ind;
FORE(i,1,mxw+1){
ind=0;
dp[i]=dp[i-1];
FORE(j,1,n+1){
if(i-w[j]>=0 and !say[i-w[j]][w[j]].empty()){ //kullan
auto it=say[i-w[j]][w[j]].begin();
int val=(*it).fi;
if(dp[i-w[j]]+val>dp[i]){
dp[i]=dp[i-w[j]]+val;
ind=j;
}
}
}
if(ind>0){
FORE(j,1,mxw+1){
say[i][j]=say[i-w[ind]][j];
}
auto it=say[i][w[ind]].begin();
int deg=(*it).fi;
int tane=(*it).se;
say[i][w[ind]].erase(*it);
if(tane-1>0){
say[i][w[ind]].insert({deg,tane-1});
}
}
else{
FORE(j,1,mxw+1){
say[i][j]=say[i-1][j];
}
}
}
cout<<dp[mxw]<<endl;
}
