#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
ll weight_limit,n;
cin >> weight_limit >> n;
vector<tuple<ll,ll,ll>> item(n);
vector<pair<ll,ll>> expanded;
for(auto &[a,b,c]: item) cin>> a >> b >> c;
for( auto [a,b,c]:item){
for( ll i=0;i<c;i++){
expanded.push_back({a,b});
}
}
vector<ll>dp(weight_limit+1,0);
for(ll i=0;i<expanded.size();i++){
ll weight=(expanded[i].second),value=(expanded[i].first);
for(ll j=weight_limit;j>0;j--){
if(j>=weight)dp[j] = max(dp[j-(weight)]+value,dp[j]);
dp[j] = max(dp[j],dp[j-1]);
}
}
cout << dp[weight_limit]<<endl;
return 0;
}
