#include <bits/stdc++.h>
#define int long long
using namespace std;
const int maxs=2e3+10;
const int maxn=1e5+10;
int dp[maxs][2], v[maxn], w[maxn], k[maxn];
signed main()
{
ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
int s, n; cin >> s >> n;
for(int i=1;i<=n;i++){
cin >> v[i] >> w[i] >> k[i];
for(int q=1;q<=k[i];q++){
if(q*w[i]>s) break;
for(int at=s;at>=q*w[i];at--) dp[at][(i%2)]=max({dp[at][(i%2)],dp[at][((i+1)%2)],dp[at-q*w[i]][((i+1)%2)]+q*v[i]});
}
}
int resp=0;
for(int i=0;i<=s;i++) resp=max({resp,dp[i][0],dp[i][1]});
cout << resp << endl;
return 0;
}
