包裹快递

#include<bits/stdc++.h>
using namespace std;
int n;
long double a[100005],b[100005],c[100005];
bool check(long double v)
{long double t=0;for(int i=1;i<=n;i++){t+=c[i]/v;if(t>b[i])return 0;if(t<a[i])t=a[i];}return 1;
}
int main()
{cin>>n;for(int i=1;i<=n;i++)cin>>a[i]>>b[i]>>c[i];long double l=0,r=1e9,mid;for(int i=1;i<=60;i++){mid=(l+r)/2;if(check(mid))r=mid;else l=mid;}cout<<fixed<<setprecision(2)<<r;
}