#include <iostream>
#include <vector>
using namespace std;
#define int long long
int dp[(int)1e5+5][(int)2005];
int v[(int)1e5+5],w[(int)1e5+5],k[(int)1e5+5];
int32_t main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int s,n;
cin>>s>>n;
for(int i=1; i<=n; i++){
cin>>v[i]>>w[i]>>k[i];
}int mx=0;
for(int i=1; i<=n; i++){
for(int j=0; j<=s; j++){
dp[i][j]=dp[i-1][j];
int x=1;
while(x<=k[i] && x*w[i]<=j){
dp[i][j]=max(dp[i][j], dp[i-1][j-x*w[i]]+x*v[i]);
x++;
}
mx=max(mx, dp[i][j]);
}
}cout<<mx<<endl;
return 0;
}
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