Educational Codeforces Round 188 (Rated for Div. 2)

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ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
2204 Educational Codeforces Round 188 (Rated for Div. 2) FINISHED False 8100 2733923 March 16, 2026, 2:35 p.m.

Problems

Solved
Index
Name
Type
Tags
Community Tag
Rating
( 21072 ) A Passing the Ball PROGRAMMING brute force

During a physical education class, (n) students are lined up, numbered from (1) to (n) from left to right. For each student, it is known that if they receive the ball, they will pass it either to the neighbor on their left or to the neighbor on their right. This is specified by a string (s) of (n) characters. Each character of the string is either L or R , where (s_i) is L if the (i)-th student passes the ball to student ((i-1)), or (s_i) is R if the (i)-th student passes the ball to student ((i+1)). The first student always passes the ball to the second, and the last one to the second last (in other words, the string (s) starts with the character R and ends with the character L ). Consider the following process: first, the first student receives the ball; then, exactly (n) times, the following occurs: the student who currently has the ball passes it to their neighbor (according to the rules described above). Your task is to determine how many students will receive the ball at least once during this process. The first line contains a single integer (t) ((1 \le t \le 10000)) — the number of test cases. Each test case consists of two lines: the first line contains a single integer (n) ((2 \le n \le 50)) — the number of students; the second line contains (s) — a sequence of (n) characters L and R . The first character of the sequence is R , and the last is L . For each test case, print one integer — the number of students who will receive the ball at least once during the described process. In the first example, student (1) receives the ball and passes it to student (2), who returns it back to student (1), who passes it back to student (2), and so on. Only students (1) and (2) received the ball. In the second example, student (1) passes the ball to student (2), who passes it to student (3), who passes it to student (4), who passes it to student

Tutorials

Educational Codeforces Round 188 Editorial

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
367041591 helgia25 A March 16, 2026, 11:57 p.m. OK C# 10 TESTS 3 78 2252800
367001392 JBR_Bunjie A March 16, 2026, 4:14 p.m. OK C# 13 TESTS 3 46 1433600
367043962 tej11 A March 17, 2026, 1:16 a.m. OK C# 13 TESTS 3 78 1433600
367060719 david.rdz A March 17, 2026, 5:55 a.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367058435 prasoon_saini_27 A March 17, 2026, 5:31 a.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367055875 sidchauhan A March 17, 2026, 5:03 a.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367052682 Athul_K A March 17, 2026, 4:22 a.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367049043 coder2911 A March 17, 2026, 3:33 a.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367033650 Bezarm A March 16, 2026, 8:58 p.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367028890 harsh_2197 A March 16, 2026, 7:57 p.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367025823 adityabelgaonkar A March 16, 2026, 7:12 p.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367025055 sarveshdhake A March 16, 2026, 6:57 p.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367024662 td10 A March 16, 2026, 6:49 p.m. OK C++17 (GCC 7-32) TESTS 3 15 0
367054482 prince19k A March 17, 2026, 4:46 a.m. OK C++20 (GCC 13-64) TESTS 3 0 0
367060108 _Rafi__ A March 17, 2026, 5:48 a.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367056884 prats27_08 A March 17, 2026, 5:14 a.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367053291 do4Z A March 17, 2026, 4:30 a.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367053137 yyyyzc A March 17, 2026, 4:28 a.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367051565 Wael_Kb A March 17, 2026, 4:07 a.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367036564 TunaMayoSandwich A March 16, 2026, 9:55 p.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367028333 Somaia_Said A March 16, 2026, 7:50 p.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367024368 GR1ZLER A March 16, 2026, 6:44 p.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367022427 Binary_God A March 16, 2026, 6:14 p.m. OK C++20 (GCC 13-64) TESTS 3 15 0
367061882 Itz_me_spartza A March 17, 2026, 6:06 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367061152 TeRa_Bhai_S3XY A March 17, 2026, 5:59 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367059927 rrohitsy0h0 A March 17, 2026, 5:47 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367058713 gondaliyabhavy29 A March 17, 2026, 5:34 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367056493 Tejas_Bramhe A March 17, 2026, 5:10 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367056340 arona1 A March 17, 2026, 5:08 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367055171 Hephaestus_X A March 17, 2026, 4:54 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367054551 sachin07_ A March 17, 2026, 4:47 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367054234 pratikpatil369 A March 17, 2026, 4:42 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367054142 foolingaround A March 17, 2026, 4:41 a.m. OK C++23 (GCC 14-64, msys2) TESTS 3 15 0
367024019 zerojanuary A March 16, 2026, 6:37 p.m. OK GNU C11 TESTS 3 0 0
367046494 liuQiee A March 17, 2026, 2:46 a.m. OK GNU C11 TESTS 3 31 0
367012985 smyel4832 A March 16, 2026, 4:49 p.m. OK GNU C11 TESTS 3 31 0
367003315 ishikamittal_22 A March 16, 2026, 4:20 p.m. OK GNU C11 TESTS 3 31 0
367024192 amartyahimalay2006 A March 16, 2026, 6:40 p.m. OK GNU C11 TESTS 3 46 0
367024089 amartyahimalay2006 A March 16, 2026, 6:38 p.m. OK GNU C11 TESTS 3 46 0
367021419 blundermon A March 16, 2026, 6:01 p.m. OK GNU C11 TESTS 3 46 0
367018994 obeymesubject A March 16, 2026, 5:32 p.m. OK GNU C11 TESTS 3 46 0
367008013 Aaditya_Jain A March 16, 2026, 4:33 p.m. OK GNU C11 TESTS 3 46 0
367005579 Rehyansh_S_Naidu A March 16, 2026, 4:26 p.m. OK GNU C11 TESTS 3 46 0
367024147 Ahad A March 16, 2026, 6:39 p.m. OK Go TESTS 3 93 1331200
367031927 mozizmeranda A March 16, 2026, 8:31 p.m. OK Go TESTS 3 171 1945600
367018517 rishank_reddy12 A March 16, 2026, 5:27 p.m. OK Java 21 TESTS 3 140 614400
367036194 bomakhamchha A March 16, 2026, 9:47 p.m. OK Java 21 TESTS 3 156 0
367016634 GODAJM A March 16, 2026, 5:12 p.m. OK Java 21 TESTS 3 156 307200
367027592 argentummm A March 16, 2026, 7:39 p.m. OK Java 21 TESTS 3 156 1536000
367032712 GMatherne A March 16, 2026, 8:41 p.m. OK Java 21 TESTS 3 171 512000
367025222 Aayush.07 A March 16, 2026, 7 p.m. OK Java 21 TESTS 3 171 512000
367018882 _vaibhav_pandey_ A March 16, 2026, 5:31 p.m. OK Java 21 TESTS 3 171 2048000
367010244 Saniya_227 A March 16, 2026, 4:40 p.m. OK Java 21 TESTS 3 187 1024000
367054306 roXstar07 A March 17, 2026, 4:43 a.m. OK Java 21 TESTS 3 203 0
366999727 anOOP325 A March 16, 2026, 4:10 p.m. OK Java 21 TESTS 3 203 204800
367056827 aranjhevyi_babochka A March 17, 2026, 5:14 a.m. OK Java 8 TESTS 3 93 0
367056261 ashutoshprj A March 17, 2026, 5:07 a.m. OK Java 8 TESTS 3 140 0
367024331 omumale127 A March 16, 2026, 6:43 p.m. OK Java 8 TESTS 3 140 0
367017405 hari_addala45 A March 16, 2026, 5:18 p.m. OK Java 8 TESTS 3 140 0
367009399 daisy_dee A March 16, 2026, 4:37 p.m. OK Java 8 TESTS 3 140 0
367008861 suguna_2007 A March 16, 2026, 4:36 p.m. OK Java 8 TESTS 3 140 0
367021064 Suhani_sikarwar__ A March 16, 2026, 5:57 p.m. OK Java 8 TESTS 3 156 0
367028732 NeelmaniPandey09 A March 16, 2026, 7:55 p.m. OK Java 8 TESTS 3 171 0
367009125 gsanya1003 A March 16, 2026, 4:36 p.m. OK Java 8 TESTS 3 171 0
367005048 pvishnukathyayani A March 16, 2026, 4:24 p.m. OK Java 8 TESTS 3 171 0
367017161 yuisgame A March 16, 2026, 5:16 p.m. OK Kotlin 1.9 TESTS 3 125 0
367016679 roman.yakhimovich A March 16, 2026, 5:12 p.m. OK Kotlin 2.2 TESTS 3 109 23654400
367004330 MXZV A March 16, 2026, 4:22 p.m. OK Kotlin 2.2 TESTS 3 187 0
367007752 peddi22 A March 16, 2026, 4:32 p.m. OK PyPy 3 TESTS 3 125 4812800
367014003 icodemason A March 16, 2026, 4:52 p.m. OK PyPy 3 TESTS 3 156 6758400
367037626 NickAs A March 16, 2026, 10:13 p.m. OK PyPy 3 TESTS 3 250 7782400
367044643 bpdolson A March 17, 2026, 1:40 a.m. OK PyPy 3 TESTS 3 250 9420800
367021044 random-variable A March 16, 2026, 5:56 p.m. OK PyPy 3 TESTS 3 343 8294400
367044327 aaquibahm A March 17, 2026, 1:29 a.m. OK PyPy 3-64 TESTS 3 46 2764800
367046150 Endo A March 17, 2026, 2:34 a.m. OK PyPy 3-64 TESTS 3 46 3276800
367047521 Endo A March 17, 2026, 3:10 a.m. OK PyPy 3-64 TESTS 3 62 3276800
367021562 hackerrorwottt A March 16, 2026, 6:03 p.m. OK PyPy 3-64 TESTS 3 62 3891200
367036496 kibr A March 16, 2026, 9:54 p.m. OK PyPy 3-64 TESTS 3 62 3993600
367015992 MinValgen A March 16, 2026, 5:05 p.m. OK PyPy 3-64 TESTS 3 62 4812800
367011106 Sensei_Alan A March 16, 2026, 4:43 p.m. OK PyPy 3-64 TESTS 3 62 4915200
367002193 Isu_Patel A March 16, 2026, 4:17 p.m. OK PyPy 3-64 TESTS 3 78 3379200
367050583 udayan8 A March 17, 2026, 3:54 a.m. OK PyPy 3-64 TESTS 3 78 3481600
367042211 fatalerror A March 17, 2026, 12:16 a.m. OK PyPy 3-64 TESTS 3 78 3481600
367055213 anuds A March 17, 2026, 4:55 a.m. OK Python 3 TESTS 3 46 204800
367005669 divyanshmangal08 A March 16, 2026, 4:26 p.m. OK Python 3 TESTS 3 46 204800
367057311 sarangpatil2905 A March 17, 2026, 5:19 a.m. OK Python 3 TESTS 3 62 0
367039610 TLE. A March 16, 2026, 11:05 p.m. OK Python 3 TESTS 3 62 0
367027617 Naveen_077 A March 16, 2026, 7:40 p.m. OK Python 3 TESTS 3 62 0
367003325 yusikome A March 16, 2026, 4:20 p.m. OK Python 3 TESTS 3 62 0
367040109 ZBeast A March 16, 2026, 11:17 p.m. OK Python 3 TESTS 3 62 102400
367015795 Bhavishya_Jhamb A March 16, 2026, 5:04 p.m. OK Python 3 TESTS 3 62 204800
367061202 sreecharan9484 A March 17, 2026, 6 a.m. OK Python 3 TESTS 3 78 0
367039410 Downfall_PP A March 16, 2026, 11 p.m. OK Python 3 TESTS 3 78 0
367015955 sandcrawler A March 16, 2026, 5:05 p.m. OK Rust 2024 TESTS 3 31 0
367000421 mo0307b1006 A March 16, 2026, 4:12 p.m. OK Rust 2024 TESTS 3 31 0

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