RT

#include<bits/stdc++.h>
#define INF (1<<30) 
using namespace std;
int t2;
inline void incntime()
{
	int x1,y1,x2,y2,on,tw;
	scanf("%d:%d %d:%d ",&x1,&y1,&x2,&y2);
	on=x1*60+y1;
	tw=x2*60+y2;
	t2=tw-on;
}
int n,t[10008],c[10008],p[10008],t1[1000003],c1[1000003],n2,f[10000008];
void binary()
{
	for(int i=1;i<=n;i++)
	{
		int a=1;
		while(p[i]!=0)
		{
			t1[++n2]=t[i]*a;
			c1[n2]=c[i]*a;
			p[i]-=a;
			a<<=1;
			if(p[i]<a)
			{
				t1[++n2]=t[i]*p[i];
				c1[n2]=c[i]*p[i];
				p[i]=0;
			}
		}
	}
}
int main()
{
	incntime();
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>t[i]>>c[i]>>p[i];
		if(p[i]==0) p[i]=INF;
	}
	binary();
	for(int i=1;i<=n2;i++)
	{
		for(int j=t2;j>=t1[i];j--)
		{
			f[j]=max(f[j],f[j-t1[i]]+c1[i]);
		}
	}
	cout<<f[t2];
	return 0;
}