I've been compiling locally with c++11, e.g. g++ -Wall -Wextra -Wpedantic -std=c++11 -o "D" "D.cpp", and I've been trying to figure out why I'm getting different results remotely. I submitted the same code to:

GNU C++11 (fails) https://mirror.codeforces.com/contest/1493/submission/110434447

GNU C++14 (passes) https://mirror.codeforces.com/contest/1493/submission/110479676

Locally my c++11 compilation is not getting the error shown in the submission on problem set 3. My gut feeling is that there's some out of bounds write occurring that i'm missing that just isn't affecting things by luck in the other submission, but if it is I just can't detect it. I would appreciate any insight (or critique of my code.)