#include <bits/stdc++.h>
#define en '\n'
#define sp ' '
#define ll long long
#define pii pair<int, int>
#define piii pair<int, pair<int, int>>
#define maxx(a,b) a=max(a,b)
#define minn(a,b) a=min(a,b)
#define st first
#define nd second
using namespace std;
const int N=1e5+5;
ll dp[2005];
int v[N],w[N],k[N];
int main(){ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int wei,n; cin>>wei>>n;
for(int i=1;i<=n;i++) cin>>v[i]>>w[i]>>k[i];
for(int i=1;i<=n;i++){
if(w[i]>wei) continue;
int tmp=min(k[i],wei/w[i]);
for(int j=1;tmp;j<<=1){
int cnt=min(j,tmp);
ll nv=1LL*v[i]*cnt,nw=1LL*w[i]*cnt;
for(int curr=wei;curr>=nw;curr--) maxx(dp[curr],dp[curr-nw]+nv);
tmp-=cnt;
}
}
cout<<dp[wei];
return 0;
}
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