Basecamp
    Home
    Problems
    Contests
    Courses
    Rating
    Posts
    Store
    Discord
amberriver
Sign in
Ruoshui Song
amberriver
Specialist
United Kingdom
United Kingdom
Joined Apr 9, 2026
Achievements (54)
Hello WorldEasy StartTough NutHardmodeHalfway ThereSnake TamerWeekend ParticipantBlitz ParticipantExplorerStudentSpecialist
OverviewRatingAchievements
Rating
1515
Problems15
Submissions22
9月
10月
11月
12月
2021
2月
3月
4月
5月
6月
7月
8月
9月
10月
11月
12月
2022
2月
3月
4月
5月
6月
7月
8月
9月
10月
11月
12月
2023
2月
3月
4月
5月
6月
7月
8月
9月
10月
11月
12月
2024
2月
3月
4月
5月
6月
7月
8月
9月
10月
11月
12月
2025
2月
3月
4月
5月
6月
7月
8月
9月
10月
11月
12月
2026
2月
3月
4月
5月
6月
7月
amberriver earned achievement Specialist1 か月前
amberriver earned achievement Student1 か月前
amberriver earned achievement Explorer1 か月前
amberriver has completed the contest Blitz Round #18 and scored 450 points4 か月前
amberriver solved problem Nasser's Prime Slices (#12432) on 4 attempt4 か月前
amberriver solved problem Rufo's massive (#12430) on first attempt4 か月前
amberriver solved problem Area (#12429) on first attempt4 か月前
amberriver has joined contest Blitz Round #184 か月前
amberriver solved problem Competitors’ quantity of the Olympiad (#43) on first attempt4 か月前
amberriver solved problem Degree of symmetry (#19) on first attempt4 か月前
amberriver solved problem The Ticket Chase (#14) on first attempt4 か月前
amberriver has completed the contest Weekend Practice #22 and scored 520 points5 か月前
amberriver solved problem Exam for the Night's Watch (#12424) on 2 attempt5 か月前
amberriver solved problem Coding Errors (#12423) on first attempt5 か月前
amberriver solved problem Bread Sorting (#6828) on first attempt5 か月前
amberriver has joined contest Weekend Practice #21 5 か月前
amberriver has joined contest Weekend Practice #225 か月前
amberriver solved problem Sequence (#1083) on first attempt5 か月前
amberriver solved problem Sum of squares Cnk (#11271) on first attempt5 か月前
amberriver solved problem Perfect square (#8877) on first attempt5 か月前
amberriver solved problem Sum and amount (#8684) on first attempt5 か月前
amberriver has joined contest Educational Round #105 か月前
amberriver has joined contest Weekend Practice #205 か月前
amberriver has joined contest Training team contest for schoolchildren5 か月前
amberriver solved problem Digits (#2) on first attempt5 か月前