#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define x first
#define y second
#define MASK(i) (1 << (i))
#define BIT(x, i) (((x) >> (i)) & 1)
#define f(i, l, r) for(int i = l; i <= r; ++i)
const int mod = 1e9 + 7;
const int ars = 1e5 + 5;
const ll infll = 1e18;
int s, n, v[ars], w[ars], k[ars], dp[ars];
signed main(){
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> s >> n;
for(int i = 1; i <= n; ++i) cin >> v[i] >> w[i] >> k[i];
for(int i = 1; i <= n; ++i){
for(int j = s; j >= w[i]; --j){
for(int q = 1; q <= k[i] and q * w[i] <= j; ++q){
dp[j] = max(dp[j], dp[j - q * w[i]] + q * v[i]);
}
}
}
cout << dp[s];
return 0;
}
