FAMCS Olympiad for scholars, Qualification (copy)

8 problems from FAMCS Olympiad for scholars, Qualification (copy) (contest 104339), difficulty -. 7/8 solutions verified against sample I/O.

8 items

FAMCS Olympiad for scholars, Qualification (copy)

Special | 8 problems | 7/8 verified | Difficulty - | 9m 10s

# Problem Rating Tags Accepted Time ✓
A Three kings 57s ✓
B Four kettlebells 1m 5s ✓
C Baguette 1m 39s
D base64 encoding 1m 2s ✓
E Compare 1m 9s ✓
F Corners 1m 4s ✓
G Card trick 59s ✓
H Triangles 1m 15s ✓
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339H - Triangles

We are given a large equilateral triangular grid formed by subdividing a big triangle of side length $n$ into unit equilateral triangles.
codeforces competitive-programming Jul 1, 2026
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339G - Card trick

We start with a deck of $n$ distinct cards. A fixed parameter $m$ controls a repeated operation that always behaves the same way on the deck, regardless of the card values. Each operation works in two phases.
codeforces competitive-programming Jul 1, 2026
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339F - Corners

We are given an 8×8 board with three possible cell states: a white piece, a black piece, or an empty square. The board is static, and we are not simulating a full game.
codeforces competitive-programming Jul 1, 2026
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339E - Compare

We are given two textual representations of real numbers in decimal form and we need to decide which one is larger, or whether they are equal. The twist is that the formatting is very loose.
codeforces competitive-programming Jul 1, 2026
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339D - base64 encoding

We are given a stream of bytes, already provided as hexadecimal values, and we need to convert that raw binary data into a Base64-encoded string using the standard alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/.
codeforces competitive-programming Jul 1, 2026
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339C - Baguette

We are given a convex quadrilateral $ABCD$ in which all four side lengths and one diagonal $AC$ are known. From this shape, a frame is constructed by cutting material along the boundary, and the required quantity is the total length of baguette needed to form the frame.
codeforces competitive-programming Jul 1, 2026
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339B - Four kettlebells

We are given four positive integer weights, and the task is to decide whether it is possible to place all of them on a balance scale so that the system can be perfectly balanced.
codeforces competitive-programming Jul 1, 2026
Practice › Codeforces Solutions › FAMCS Olympiad for scholars, Qualification (copy) ›

CF 104339A - Three kings

Each king commands an army split into identical regiments. Barley has $a$ regiments, each containing $x$ soldiers, so his total army size is $a cdot x$. Hops and Malt are described the same way, using $b cdot y$ and $c cdot z$.
codeforces competitive-programming Jul 1, 2026