#include <iostream>
#include <cstdio>
#include <cstring>
#include <string>
#include <cctype>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <vector>
#include <cstdlib>
#include <bitset>
#include <deque>
#define inf 0x3f3f3f3f
#define infll 0x3f3f3f3f3f3f3f3fll
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
const int maxn = 100005;
const int maxm = 2005;
ll dp[maxm];
int n, m;
ll c[maxn], v[maxn], w[maxn];
int main() {
cin >> m >> n;
for (int i = 1; i <= n; i++) {
cin >> v[i] >> w[i] >> c[i];
}
for (int i = 1; i <= n; i++) {
for (int j = m; j >= w[i]; j--) {
for (int k = 1; k <= c[i] && k * w[i] <= j; k++) {
dp[j] = max(dp[j], dp[j - k * w[i]] + k * v[i]);
}
}
}
ll ans = 0;
for (int i = 1; i <= m; i++) ans = max(ans, dp[i]);
cout << ans << endl;
return 0;
}
