mkdir {A..M}
alias solve='g++ main.cpp -o solve_exefile -g -fsanitize=undefined,address -fno-omit-frame-pointer -Wall -Wextra && echo "Compile Done" && time ./solve_exefile'
alias fast='g++ main.cpp -o solve_exefile -O2 -Wall && echo "Compile Done" && time ./solve_exefile'