You have c1 letters 'a', c2 letters 'b', ..., c26 letters 'z'. You need to construct a lovely line of length n from them (clearly, you can't utilize the I-th letter more than ci occasions). Every ci is more noteworthy than n3.    A string is called delightful in case there are no palindromic coterminous substrings of odd length more prominent than 1 in it. For instance, the string "abacaba" isn't

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
icon
Related questions
Question

Correct answer will be upvoted else downvoted. Computer science.

 

 You have c1 letters 'a', c2 letters 'b', ..., c26 letters 'z'. You need to construct a lovely line of length n from them (clearly, you can't utilize the I-th letter more than ci occasions). Every ci is more noteworthy than n3. 

 

A string is called delightful in case there are no palindromic coterminous substrings of odd length more prominent than 1 in it. For instance, the string "abacaba" isn't wonderful, it has a few palindromic substrings of odd length more noteworthy than 1 (for instance, "aca"). Another model: the string "abcaa" is wonderful. 

 

Work out the number of various strings you can assemble, and print the appropriate response modulo 998244353. 

 

Input 

 

The main line contains one integer n (3≤n≤400). 

 

The subsequent line contains 26 integers c1, c2, ..., c26 (n3<ci≤n). 

 

Output 

 

Print one integer — the number of strings you can construct, taken modulo 998244353.

 

 

Expert Solution
steps

Step by step

Solved in 4 steps with 1 images

Blurred answer
Knowledge Booster
Time complexity
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education