#include <bits/stdc++.h>
using namespace std;
int main()
{
// The first line of input contains two positive integers, S and N.
// The next N lines of input will each contain three integers, where the i-th line contains Vi
// , Wi
// and Ki
// , the value in SGD, weight in kilograms and number of the i-th item respectively
//For all subtasks, 1 ≤ S ≤ 2000bagWeight, 1 ≤ Vi ≤ 1000000, 1 ≤ Wi ≤ S.
int bagWeight=0,items=0;
cin>>bagWeight>>items;
vector<int> values(items,0),weights(items,0),counts(items,0);
for(int i=0;i<items;i++){
cin>>values[i]>>weights[i]>>counts[i];
}
vector<vector<int>> dp(items,vector<int> (bagWeight+1,-1));
for(int i=0;i<items;i++){
dp[i][0]=0;
}
for(int i=0;i<items;i++){
//picking 0 to k items
for(int k=counts[i];k>=1;k--){
int currWeight=k*weights[i];
int currValue=k*values[i];
for(int j=bagWeight;j>=currWeight;j--){
if(i>0){
dp[i][j]=max(dp[i][j],dp[i-1][j]);
}
if(i-1>=0 && dp[i-1][j-currWeight]!=-1){
dp[i][j]=max(dp[i][j],currValue+dp[i-1][j-currWeight]);
}
if(dp[i][j-currWeight]!=-1){
dp[i][j]=max(dp[i][j],currValue+dp[i][j-currWeight]);
}
}
}
}
// cout<<"done\n";
// for(int i=0;i<items;i++){
// //picking 0 to k items
// for(int j=0;j<=bagWeight;j++){
// cout<<dp[i][j]<<" ";
// }
// cout<<"\n";
// }
cout<<dp[items-1][bagWeight]<<"\n";
// vector<int> dp(bagWeight+1,0);
//for a given bagWeight,what is maximum value we can get
// for(int i=0;i<items;i++){
// for(int j=bagWeight;j>=0;j++){
// }
// }
// 15 5
// 4 12 1
// 2 1 1
// 10 4 1
// 1 1 1
// 2 2 1
return 0;
}
