Codeforces 923 Div 3 B | Following the String | C++ Solution Explained | Easy Greedy
Автор: BitChaos
Загружено: 2026-03-13
Просмотров: 1
Описание:
Codeforces Round 923 Div 3 Problem B - Following the String
In this video, we solve Following the String using C++ with a simple greedy + constructive algorithm approach.
✅ Understand how trace arrays work
✅ Build valid string from frequency counts
✅ Learn why this greedy method always works
✅ Competitive programming explanation step by step
Problem difficulty: 900 rating
Perfect for beginners improving in Codeforces Div3 🔥
Topics Covered:
Trace array logic
Character frequency tracking
Greedy construction
Efficient implementation in O(n)
Code used:
C++17 STL
Vectors + Frequency Mapping
Practice More:
Solve similar constructive problems regularly to improve contest speed ⚡
#codeforces #competitiveprogramming #cpp #greedy #constructivealgorithms #codinginterview
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