import java.io.*;
import java.util.StringTokenizer;
public class knapsack {
public static void main(String[] args) throws IOException {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer tokenizer = new StringTokenizer(in.readLine());
int s = Integer.parseInt(tokenizer.nextToken());
int n = Integer.parseInt(tokenizer.nextToken());
item[] items = new item[n+1];
int[] dp = new int[s+1];
dp[0] = 1;
for (int i = 1; i < n+1; i++) {
tokenizer = new StringTokenizer(in.readLine());
items[i] = new item(Integer.parseInt(tokenizer.nextToken()),Integer.parseInt(tokenizer.nextToken()),Integer.parseInt(tokenizer.nextToken()));
}
for (int i = 0; i < n; i++) {
int v = items[i+1].v;
int w = items[i+1].w;
int k = items[i+1].k;
for (int j = s; j >= 0; j--) {
if (dp[j] >= 1) {
for (int count = 0; count <= k; count++) {
if (j + w * count <= s) {
dp[j+w*count] = Math.max(dp[j+w*count], dp[j] + v*count);
}
else {
break;
}
}
}
}
}
int ans = 0;
for (int i = 0; i < s+1; i++) {
ans = Math.max(ans, dp[i]);
}
System.out.println(ans-1);
}
static class item {
int v, w, k;
item(int v, int w, int k) {
this.v = v;
this.w = w;
this.k = k;
}
}
}
