I submitted two same codes for problem 949C - Data Center Maintenance. Initially, I chose Lang GNU C++14 but got RTE. After a while, I tried my luck, chose GNU C++11 and miraculously, got AC. Here are my codes:
Code with GNU C++14 : 36116002 (verdict RTE)
Code with GNU C++11 : 36116440 (verdict AC)
I have not found anything to explain it and I'm afraid that these things may happen during some future contests. Can you suggest any reasons? Thank you!