#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pii> vpii;
const int MOD = 1e9 + 7;
const int INF = INT_MAX;
const ll LINF = LLONG_MAX;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(v) v.begin(), v.end()
#define rep(i, a, b) for(int i = a; i < b; ++i)
void solve() {
int s, n;
cin >> s >> n;
int v[n], w[n], k[n];
rep(i, 0, n)
cin >> v[i] >> w[i] >> k[i];
vector<int> dp(s+1, -INF);
dp[0] = 0;
for(int i = 0; i < n; ++i){
for(int j = 0; (j*w[i] <= s && j <= k[i]); ++j){
for(int l = s - j*w[i]; l >= 0; l--){
dp[l+j*w[i]] = max(dp[l+j*w[i]], dp[l]+j*v[i]);
}
}
}
for(int i = 1; i <= s; ++i){
dp[i] = max(dp[i], dp[i-1]);
}
cout << dp[s] << endl;
}
int main() {
fast;
int t = 1;
while(t--) {
solve();
}
return 0;
}
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