Codeforces Round 245 (Div. 2)

Solutions for Codeforces Round 245 (Div. 2) (contest 430). 1/2 problems verified against sample I/O. Difficulty range: 1400-1600.

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Codeforces Round 245 (Div. 2)

Type: Div. 2 | Problems: 2 | Verified: 1/2 | Rating range: 1400-1600 | Time: 3m 20s

Problem Name Rating Tags Solve Time Verified
A Points and Segments (easy) 1600 constructive-algorithms, sortings 1m 34s ✗
B Balls Game 1400 brute-force, two-pointers 1m 46s ✓
Practice › Codeforces Solutions › Codeforces Round 245 (Div. 2) ›

CF 430A - Points and Segments (easy)

We are asked to color a set of points on a number line using two colors, red and blue, so that for each given segment, the number of red and blue points inside that segment differ by at most one.
codeforces competitive-programming constructive-algorithms sortings May 29, 2026
Practice › Codeforces Solutions › Codeforces Round 245 (Div. 2) ›

CF 430B - Balls Game

We are given a row of balls, each colored with one of k colors. No color initially appears three times in a row. Iahub holds a single extra ball of a given color x and can insert it anywhere in the row, including before the first ball or after the last.
codeforces competitive-programming brute-force two-pointers May 29, 2026