#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N=2e6+7;
int n,m,ans=1e17;
int p[N],w[N],d[N];
int check(int x){
	int sum=0;
	for(int i=1;i<=n;i++){
		if(p[i]<=x){
			sum+=max(x-p[i]-d[i],0ll)*w[i];
		}
		else{
			sum+=max(p[i]-x-d[i],0ll)*w[i];
		}
	}
	ans=min(ans,sum);
	return sum;
}
signed main(){
	freopen("Concert.in","r",stdin);
	freopen("Concert.out","w",stdout);
	cin>>n;
	int l=1e17,r=-1e17;
	for(int i=1;i<=n;i++){
		cin>>p[i]>>w[i]>>d[i];
		l=min(l,p[i]);
		r=max(r,p[i]);
	}
	while(l<r){
	    int lmid=l+(r-l)/3;
	    int rmid=r-(r-l)/3;
	    if(check(lmid)<=check(rmid)) r=rmid-1;
	    else l=lmid+1;
	}
	check(l);
	cout<<ans;
	
	return 0;
}