Codeforces Round 511 (Div. 2)

2 problems from Codeforces Round 511 (Div. 2) (contest 1047), difficulty 800-900. 1/2 solutions verified against sample I/O.

2 items

Codeforces Round 511 (Div. 2)

Div. 2 | 2 problems | 1/2 verified | Difficulty 800-900 | 11m 16s

# Problem Rating Tags Accepted Time ✓
A Little C Loves 3 I 800 math 21,282 4m 37s ✓
B Cover Points 900 geometry, math 18,775 6m 39s
Practice › Codeforces Solutions › Codeforces Round 511 (Div. 2) ›

CF 1047B - Cover Points

We are given a set of points on a plane. We must place a very specific triangle shape so that every point lies either inside it or on its boundary.
codeforces competitive-programming geometry math Jun 15, 2026
Practice › Codeforces Solutions › Codeforces Round 511 (Div. 2) ›

CF 1047A - Little C Loves 3 I

We are given a single integer $n$, and we need to represent it as a sum of three positive integers $a, b, c$. The extra restriction is that none of these three numbers is allowed to be divisible by 3.
codeforces competitive-programming math Jun 15, 2026