QOJ.ac
QOJ
Universal Cup
Time Limit: 1 s
Memory Limit: 1024 MB
Total points: 100
Communication
Korea IOI Team Selection Test (KOI TST) 2021, 1st Selection Contest
D. 철도
The problem is available in the following languages:
C++98, C++11, C++14, C++17, C++20, C++23