#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
void DBG() { cerr << "]" << endl; }
template<class H, class... T> void DBG(H h, T... t) { cerr << to_string(h); if(sizeof...(t)) cerr << ", "; DBG(t...); }
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
const int N = 2003;
int dp[N][2];
void solve() {
int s, n; cin >> s >> n;
vector<pair<int, int>> items;
for (int i = 0; i < n; i++) {
int v, w, k; cin >> v >> w >> k;
k = min(k, 2000);
for (int j = 0; j < k; j++)
items.push_back({v, w});
}
int red = 0;
for (auto [v, w] : items) {
for (int j = s; j >= 0; j--) {
dp[j][red] = dp[j][red^1];
if (j-w >= 0)
dp[j][red] = max(dp[j][red], dp[j-w][red^1] + v);
}
red ^= 1;
}
cout << dp[s][red^1] << "\n";
}
signed main() {
ios::sync_with_stdio(false); cin.tie(0);
int t=1; //cin >> t;
while (t--) {
solve();
}
}
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