lab_btree feedback for wangyihan.22
g++ -std=c++1y -g -O0 -pedantic -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -Werror -Wfatal-errors -MMD -MP -c   -c -o tests/basic.o tests/basic.cpp
g++ tests/basic.o  -std=c++1y -lpthread -o test
    ### test_insertion_idx_emp success: +1pts

    ### test_insertion_idx_small success: +1pts

    ### test_btree3_small success: +1pts

    ### test_btree3_large_seq success: +1pts

    ### test_btree3_large_rand success: +1pts

    ### test_btree64_large_seq success: +1pts

    ### test_btree64_large_rand success: +2pts

    ### test_btree128_med_rand success: +1pts

    ### test_btree12_strings success: +1pts

    ### memory errors: -3pts


Total: 7