Codeforces Round 275 (Div. 2)

2 problems from Codeforces Round 275 (Div. 2) (contest 483), difficulty 1100-1800. 0/2 solutions verified against sample I/O.

2 items

Codeforces Round 275 (Div. 2)

Div. 2 | 2 problems | 0/2 verified | Difficulty 1100-1800 | 16m 14s

# Problem Rating Tags Accepted Time ✓
A Counterexample 1100 brute-force, implementation, math 24,881 10m 52s
B Friends and Presents 1800 binary-search, math 4,341 5m 22s
Practice › Codeforces Solutions › Codeforces Round 275 (Div. 2) ›

CF 483A - Counterexample

We are asked to construct three integers inside a given interval such that they form a very specific pattern of coprimality relationships.
codeforces competitive-programming brute-force implementation math number-theory May 31, 2026
Practice › Codeforces Solutions › Codeforces Round 275 (Div. 2) ›

CF 483B - Friends and Presents

Codeforces 483B: Friends and Presents
codeforces competitive-programming binary-search math May 31, 2026