Edinburgh Competition 2019

5 problems from Edinburgh Competition 2019 (contest 102416), difficulty -. 3/5 solutions verified against sample I/O.

5 items

Edinburgh Competition 2019

Special | 5 problems | 3/5 verified | Difficulty - | 10m 22s

# Problem Rating Tags Accepted Time ✓
A Palindrome 1m 27s
B Efficient market 2m 28s ✓
C Quick coffee 2m 32s ✓
D Calculated risk 1m 47s ✓
E Space guardians 2m 8s
Practice › Codeforces Solutions › Edinburgh Competition 2019 ›

CF 102416A - Palindrome

We need to inspect a collection of positive integers and count how many have the same sequence of digits when read from left to right and from right to left.
codeforces competitive-programming Aug 14, 2026
Practice › Codeforces Solutions › Edinburgh Competition 2019 ›

CF 102416E - Space guardians

We have at most 100 spherical protected regions in three-dimensional space. Starship (i) has center ((xi,yi,zi)) and radius (ri). We must choose some starships whose original spheres do not overlap. Touching at exactly one point is allowed.
codeforces competitive-programming Aug 14, 2026
Practice › Codeforces Solutions › Edinburgh Competition 2019 ›

CF 102416C - Quick coffee

We need to make exactly d dollars of change. The available coin denominations are every integer from a through some upper bound b, inclusive, and we may use any denomination any number of times.
codeforces competitive-programming Aug 12, 2026
Practice › Codeforces Solutions › Edinburgh Competition 2019 ›

CF 102416D - Calculated risk

We repeatedly roll a fair die with k faces. A successful roll is one that shows 1, and the game ends as soon as we have seen n successful rolls consecutively.
codeforces competitive-programming Aug 12, 2026
Practice › Codeforces Solutions › Edinburgh Competition 2019 ›

CF 102416B - Efficient market

We have m companies and n future days. For every company, we know its stock price on every day. The input stores one company per row, so each row contains that company's prices from day 1 through day n. We start with d pounds before the first known day.
codeforces competitive-programming Aug 12, 2026