#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<set>
#include<map>
#include<queue>
#include<stack>
#include<deque>
#include<vector>
#include<string>
using namespace std;

#define INF 1000000000
#define lint long long
#define pb push_back
#define mp make_pair
#define MOD 1000000007

pair <int,pair<int,int> > a[100005];
lint p[100005],mx[100005],d[100005];
int n;

int check(lint g)
{
    int i,j=n,k;
    lint gsum=0,esum,enc,enn;
    for(i=n;i>0;--i)
    {
        gsum+=a[i].second.first;
        while(1)
        {
            if(gsum-a[j].second.first<g)break;
            gsum-=a[j].second.first;
            --j;
        }
        if(gsum<g)continue;
        enc=p[j]-p[i-1]+(a[i].first-a[i-1].first);
        enn=mx[j]-p[j];
        if(enn+enc>=0)return 1;
    }
    return 0;
}
int main()
{
    int i,j;
    lint l=0,r=1;
    scanf("%d",&n);
    p[0]=0;
    for(i=1;i<=n;++i)
    {
        scanf("%d %d %d",&a[i].first,&a[i].second.first,&a[i].second.second);
        d[i]=d[i-1]+a[i].first;
        p[i]=p[i-1]+a[i].second.second+a[i-1].first-a[i].first;
        r+=a[i].second.first;
    }
    p[n+1]=INF*1ll*INF;
    mx[n]=p[n];
    for(i=n-1;i>0;--i)
    {
        mx[i]=max(p[i],mx[i+1]);
    }
    while(r-l>1)
    {
        lint mid=(r+l)/2;
        if(check(mid))
            l=mid;
        else r=mid;
    }
    if(check(r))l=r;
    printf("%lld",l);
    return 0;
}