Codeforces Beta Round 69 (Div. 2 Only)

2 problems from Codeforces Beta Round 69 (Div. 2 Only) (contest 80), difficulty 800-1200. 2/2 solutions verified against sample I/O.

2 items

Codeforces Beta Round 69 (Div. 2 Only)

Div. 2 | 2 problems | 2/2 verified | Difficulty 800-1200 | 2m 56s

#	Problem	Rating	Tags	Accepted	Time	✓
A	Panoramix's Prediction	800	brute-force	66,273	1m 18s	✓
B	Depression	1200	geometry, math	4,998	1m 38s	✓

Practice › Codeforces Solutions › Codeforces Beta Round 69 (Div. 2 Only) ›

CF 80A - Panoramix's Prediction

Yesterday the Gauls defeated n Roman soldiers, and n is guaranteed to be a prime number. Today they defeated m soldiers, where m n. We need to decide whether m is exactly the next prime number that comes immediately after n. The key detail is the phrase "next prime".

Practice › Codeforces Solutions › Codeforces Beta Round 69 (Div. 2 Only) ›

CF 80B - Depression

We are given a digital time in HH:MM format and need to determine how far the analog clock hands must rotate from the initial position 12:00. The clock starts with both hands pointing at 12. We may rotate each hand independently, and only in the clockwise direction.