Codeforces Round #678 (Div. 2) SOLUTIONS January 30, 2021October 24, 2020 by Cyber Geek Page Contents Codeforces Round #678 (Div. 2) SOLUTIONSA. Floor Number SOLUTION CODE FORCESB. Symmetric Matrix SOLUTION CODE FORCESC. Increase and Copy SOLUTION CODE FORCESD. Non-zero Segments SOLUTION CODE FORCESE. Rock, Paper, Scissors SOLUTION CODE FORCESF. Number of Subsequences SOLUTION CODE FORCES Codeforces Round #678 (Div. 2) SOLUTIONS A. Floor Number SOLUTION CODE FORCES B. Symmetric Matrix SOLUTION CODE FORCES C. Increase and Copy SOLUTION CODE FORCES D. Non-zero Segments SOLUTION CODE FORCES E. Rock, Paper, Scissors SOLUTION CODE FORCES F. Number of Subsequences SOLUTION CODE FORCES