#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int nmax = 1e5 + 5;
int n, m, a[nmax], w[nmax], v[nmax];
int dp[2005];
int main()
{
cin.tie(0)->sync_with_stdio(0);
cin >> m >> n;
for (int i = 1; i <= n; i++)
{
cin >> v[i] >> w[i] >> a[i];
}
for (int i = 1; i <= n; i++)
{
int x = a[i];
for (int k = 1; x > 0; k <<= 1)
{
int r = min(x, k);
for (int j = m; j >= w[i] * r; j--)
{
dp[j] = max(dp[j], dp[j - w[i] * r] + v[i] * r);
}
x -= r;
}
}
cout << dp[m];
}
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