Package for this problem was not updated by the problem writer or Codeforces administration after we’ve upgraded the judging servers. To adjust the time limit constraint, solution execution time will be multiplied by 2. For example, if your solution works for 400 ms on judging servers, then value 800 ms will be displayed and used to determine the verdict.

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

The problem statement has recently been changed. View the changes.

×
B. Jury Size

time limit per test

1 secondmemory limit per test

256 megabytesinput

input.txtoutput

output.txtIn 2013, the writers of Berland State University should prepare problems for *n* Olympiads. We will assume that the Olympiads are numbered with consecutive integers from 1 to *n*. For each Olympiad we know how many members of the jury must be involved in its preparation, as well as the time required to prepare the problems for her. Namely, the Olympiad number *i* should be prepared by *p*_{i} people for *t*_{i} days, the preparation for the Olympiad should be a continuous period of time and end exactly one day before the Olympiad. On the day of the Olympiad the juries who have prepared it, already do not work on it.

For example, if the Olympiad is held on December 9th and the preparation takes 7 people and 6 days, all seven members of the jury will work on the problems of the Olympiad from December, 3rd to December, 8th (the jury members won't be working on the problems of this Olympiad on December 9th, that is, some of them can start preparing problems for some other Olympiad). And if the Olympiad is held on November 3rd and requires 5 days of training, the members of the jury will work from October 29th to November 2nd.

In order not to overload the jury the following rule was introduced: one member of the jury can not work on the same day on the tasks for different Olympiads. Write a program that determines what the minimum number of people must be part of the jury so that all Olympiads could be prepared in time.

Input

The first line contains integer *n* — the number of Olympiads in 2013 (1 ≤ *n* ≤ 100). Each of the following *n* lines contains four integers *m*_{i}, *d*_{i}, *p*_{i} and *t*_{i} — the month and day of the Olympiad (given without leading zeroes), the needed number of the jury members and the time needed to prepare the *i*-th Olympiad (1 ≤ *m*_{i} ≤ 12, *d*_{i} ≥ 1, 1 ≤ *p*_{i}, *t*_{i} ≤ 100), *d*_{i} doesn't exceed the number of days in month *m*_{i}. The Olympiads are given in the arbitrary order. Several Olympiads can take place in one day.

Use the modern (Gregorian) calendar in the solution. Note that all dates are given in the year 2013. This is not a leap year, so February has 28 days. Please note, the preparation of some Olympiad can start in 2012 year.

Output

Print a single number — the minimum jury size.

Examples

Input

2

5 23 1 2

3 13 2 3

Output

2

Input

3

12 9 2 1

12 8 1 3

12 8 2 2

Output

3

Input

1

1 10 1 13

Output

1

Codeforces (c) Copyright 2010-2021 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Mar/08/2021 00:21:03 (i2).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|