#include<bits/stdc++.h>
const int maxn=100005;
long variables[4][maxn]; //c[maxn],value[maxn],num[maxn], dp[maxn];
int V;
void ZeroOnePack (long cost,long val){
for(long i=V;i>=cost;i--) {
variables[3][i]=std::max(variables[3][i],variables[3][i-cost] + val);
}
return ;
}
int main() {
int n;
std::cin>>V>>n; // knapsack size V, n kinds of items
for(int i=1;i<=n;i++) {
std::cin>>variables[1][i]>>variables[0][i]>>variables[2][i]; // weight, value, quantity
}
for(int i=1;i<=n;i++) {
long k=1;
while(k<variables[2][i]){
ZeroOnePack(k * variables[0][i], k * variables[1][i]);
variables[2][i]-=k;
k*=2;
}
ZeroOnePack(variables[2][i]*variables[0][i],variables[2][i]*variables[1][i]);
}
std::cout<<variables[3][V]<<'\n';
}
