g++-10 -Wall -lm -static -DEVAL -o meetings -O2 meetings.cpp grader.cpp -std=c++11
g++-10 -Wall -lm -static -DEVAL -o meetings -O2 meetings.cpp grader.cpp -std=c++14
g++-10 -Wall -lm -static -DEVAL -o meetings -O2 meetings.cpp grader.cpp -std=c++17
