$2 \bigoplus 10= 8$
Codeforces645 Div2 prob:4/5/6 rank:523
2020.7.17 AIsing Programming Contest 2020 prob:4/5/6 rank:933
2020.7.21 Codeforces Round #658 prob:5/5/6 rank:114
2020.7.24 Topcoder SRM 788 DIV2 prob:3/3/3
2020.7.25 M-SOLUTIONS Programming Contest 2020 prob:5/5/6 rank:282
2020.7.30 Codeforces Round #660 prob:4/4/5 rank:261
2020.8.2 Atcoder Beginner Contest 174 prob:6/6/6 rank:281
2020.8.29 Atcoder Beginner Contest 177 prob:5/6/6 rank:638