#include <bits/stdc++.h>
#define div /
#define ll long long
#define fore(i, l, r) for(int i=int(l); i<int(r); i++)
#define sz(a) int((a).size())
using namespace std;
const int INF = 1e9;
const int MX = 5e5 + 23;
const int MOD = 1000000007;
const int MAX_N = 5e5+23;
const int N = 1e6;
void solve() {
int s,n;
cin >> s >> n;
vector<int>p;
vector<int>we;
p.push_back(0);
we.push_back(0);
fore(i,0,n) {
int v,w,k;
cin >> v >> w >> k;
fore(j,0,min(k,s div w)) {
p.push_back(v);
we.push_back(w);
}
}
int dp[p.size()+5][s+5];
memset(dp,0,sizeof dp);
fore(i,1,p.size()) {
fore(j,1,s+1) {
dp[i][j]+=dp[i-1][j];
if(j >= we[i] && dp[i-1][j-we[i]] + p[i] > dp[i][j])
dp[i][j] = dp[i-1][j-we[i]] + p[i];
}
}
cout << dp[p.size()-1][s] << endl;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(NULL);
//freopen("feast.in","r",stdin);
//freopen("feast.out","w",stdout);
int t=1;
while(t--)
solve();
}
