#include <bits/stdc++.h>
#define nn '\n'
#define int long long
#define pb push_back
#define all(x) x.begin(), x.end()
#define sec second
#define vec std::vector
using namespace std;
const int N = 2005;
vec<pair<int, int>> p;
int dp[N];
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int n , m ;
cin >> n >> m;
for (int i = 0; i < m; i++) {
int a , b , c;
cin >> a>> b >> c;
for (int j = n; j >= b; j--) {
dp[j] = max(dp[j], dp[j - b] + a);
}
}
int ans = 0;
for (int i = 1; i <= n; i++) {
ans = max(ans, dp[i]);
}
cout << ans;
}
