PROBLEM LINK:
Practice
Contest: Division 1
Contest: Division 2
Contest: Division 3
Contest: Division 4
Author: S. Manuj Nanthan
Preparer: Mradul Bhatnagar
Testers: Satyam, Jatin Garg
Editorialist: Nishank Suresh
DIFFICULTY:
481
PREREQUISITES:
None
PROBLEM:
Bob’s current bank balance is W rupees. Each month, rupees X is deposited into it and Y is deducted. How much remains in it after Z months?
EXPLANATION:
Each month, X rupees is added and Y is deducted, leading to an overall change of X-Y in his balance.
In Z months, this amounts to a total change of Z\times(X-Y).
So, the final balance is W + Z\times(X-Y).
TIME COMPLEXITY
\mathcal{O}(1) per test case.
CODE:
Editorialist's code (Python)
for _ in range(int(input())):
w, x, y, z = map(int, input().split())
print(w + z*(x-y))