All Contributions

Complete record of every solution change. Each contribution is peer-reviewed.

Contribute

19843 contributions

1936 problems

99 contributors

solved· 8.1.16

8.1.16 new solution

ar4senN July 3, 2025 at 08:34 AM

#14983

less than a minute between problems

solved· 6.6.16

6.6.16 new solution

jzmicer July 3, 2025 at 08:34 AM

#14982

10 hours 20 minutes between problems

solved· 2.7.39 in 19 minutes 4 seconds

2.7.39 edit

Picksell Prod July 2, 2025 at 10:13 PM

#14981

2.7.39 edit

Picksell Prod July 2, 2025 at 10:00 PM

#14980

2.7.39 new solution

Picksell Prod July 2, 2025 at 09:54 PM

#14979

2 days 10 hours between problems

solved· 5.9.4 in 7 minutes 9 seconds

5.9.4 edit

Picksell Prod June 30, 2025 at 11:15 AM

#14978

5.9.4 edit

Picksell Prod June 30, 2025 at 11:15 AM

#14977

5.9.4 edit

Picksell Prod June 30, 2025 at 11:13 AM

#14976

5.9.4 new solution

Picksell Prod June 30, 2025 at 11:08 AM

#14975

2 hours 56 minutes between problems

solved· 11.5.12 in 1 hour 53 minutes

11.5.12 edit

igor June 30, 2025 at 08:12 AM

#14974

11.5.12 edit

igor June 30, 2025 at 08:08 AM

#14973

11.5.12 edit

igor June 30, 2025 at 08:01 AM

#14972

11.5.12 edit

igor June 30, 2025 at 07:37 AM

#14971

11.5.12 edit

igor June 30, 2025 at 07:19 AM

#14970

11.5.12 edit

igor June 30, 2025 at 06:51 AM

#14969

11.5.12 new solution

igor June 30, 2025 at 06:19 AM

#14968

11 hours 7 minutes between problems

solved· 5.9.3 in 46 seconds

5.9.3 edit

Picksell Prod June 29, 2025 at 07:12 PM

#14967

5.9.3 edit

Picksell Prod June 29, 2025 at 07:11 PM

#14966

21 minutes between problems

solved· 6.4.10 in 10 minutes 16 seconds

6.4.10 edit

jzmicer June 29, 2025 at 06:49 PM

#14965

6.4.10 new solution

jzmicer June 29, 2025 at 06:39 PM

#14964

1 hour 42 minutes between problems

solved· 1.4.12

1.4.12 edit

AW3Rgo0l June 29, 2025 at 04:56 PM

#14963

2 hours 47 minutes between problems

solved· 5.9.2 in 3 minutes

5.9.2 edit

Picksell Prod June 29, 2025 at 02:08 PM

#14962

5.9.2 edit

Picksell Prod June 29, 2025 at 02:06 PM

#14961

5.9.2 edit

Picksell Prod June 29, 2025 at 02:06 PM

#14960

5.9.2 new solution

Picksell Prod June 29, 2025 at 02:05 PM

#14959

1 hour 38 minutes between problems

solved· 13.3.1 in 5 minutes 55 seconds

13.3.1 edit

Picksell Prod June 29, 2025 at 12:27 PM

#14958

13.3.1 new solution

Picksell Prod June 29, 2025 at 12:21 PM

#14957

18 minutes between problems

solved· 13.2.15 in 1 minute 50 seconds

13.2.15 edit

Picksell Prod June 29, 2025 at 12:03 PM

#14956

13.2.15 edit

Picksell Prod June 29, 2025 at 12:02 PM

#14955

13.2.15 new solution

Picksell Prod June 29, 2025 at 12:01 PM

#14954

2 hours 1 minute between problems

solved· 3.1.14 in 2 minutes 45 seconds

3.1.14 edit

Valentao June 29, 2025 at 09:59 AM

#14953

3.1.14 edit

Valentao June 29, 2025 at 09:57 AM

#14952

3.1.14 new solution

Valentao June 29, 2025 at 09:56 AM

#14951

16 hours 14 minutes between problems

solved· 13.3.15 in 13 seconds

13.3.15 edit

Picksell Prod June 28, 2025 at 05:42 PM

#14950

13.3.15 edit

Picksell Prod June 28, 2025 at 05:42 PM

#14949

less than a minute between problems

solved· 7.2.3

7.2.3 edit

emixter June 28, 2025 at 05:41 PM

#14948

less than a minute between problems

solved· 13.3.15

13.3.15 new solution

Picksell Prod June 28, 2025 at 05:41 PM

#14947

40 minutes between problems

solved· 13.3.14

13.3.14 edit

Picksell Prod June 28, 2025 at 05:00 PM

#14946

17 minutes between problems

solved· 7.2.3

7.2.3 new solution

emixter June 28, 2025 at 04:43 PM

#14945

51 minutes between problems

solved· 13.3.14

13.3.14 new solution

Picksell Prod June 28, 2025 at 03:52 PM

#14944

19 minutes between problems

solved· 7.2.1

7.2.1 edit

emixter June 28, 2025 at 03:32 PM

#14943

48 minutes between problems

solved· 6.4.14

6.4.14 edit

jzmicer June 28, 2025 at 02:44 PM

#14942

13 minutes between problems

solved· 7.2.1

7.2.1 new solution

emixter June 28, 2025 at 02:30 PM

#14941

1 hour 43 minutes between problems

solved· 13.3.13 in 3 minutes 28 seconds

13.3.13 edit

Picksell Prod June 28, 2025 at 12:47 PM

#14940

13.3.13 edit

Picksell Prod June 28, 2025 at 12:46 PM

#14939

13.3.13 new solution

Picksell Prod June 28, 2025 at 12:44 PM

#14938

2 hours 38 minutes between problems

solved· 12.2.15 in 41 seconds

12.2.15 edit

Picksell Prod June 28, 2025 at 10:05 AM

#14937

12.2.15 new solution

Picksell Prod June 28, 2025 at 10:05 AM

#14936

16 hours 40 minutes between problems

solved· 6.4.14 in 2 minutes 22 seconds

6.4.14 edit

jzmicer June 27, 2025 at 05:24 PM

#14935

6.4.14 edit

jzmicer June 27, 2025 at 05:22 PM

#14934

1 hour 57 minutes between problems

solved· 14.1.5 in 1 hour 4 minutes

14.1.5 edit

Picksell Prod June 27, 2025 at 03:24 PM

#14933

14.1.5 edit

Picksell Prod June 27, 2025 at 03:24 PM

#14932

14.1.5 edit

Picksell Prod June 27, 2025 at 03:23 PM

#14931

14.1.5 edit

Picksell Prod June 27, 2025 at 02:20 PM

#14930

14.1.5 edit

Picksell Prod June 27, 2025 at 02:20 PM

#14929

14.1.5 edit

Picksell Prod June 27, 2025 at 02:20 PM

#14928

14.1.5 new solution

Picksell Prod June 27, 2025 at 02:19 PM

#14927

1 hour 49 minutes between problems

solved· 6.4.14

6.4.14 new solution

jzmicer June 27, 2025 at 12:30 PM

#14926

2 hours 19 minutes between problems

solved· 7.2.2 in 2 minutes 43 seconds

7.2.2 edit

emixter June 27, 2025 at 10:11 AM

#14925

7.2.2 edit

emixter June 27, 2025 at 10:08 AM

#14924

35 minutes between problems

solved· 2.6.37 in 6 minutes 32 seconds

2.6.37 edit

Picksell Prod June 27, 2025 at 09:32 AM

#14923

2.6.37 edit

Picksell Prod June 27, 2025 at 09:26 AM

#14922

2 minutes between problems

solved· 6.4.18

6.4.18 edit

jzmicer June 27, 2025 at 09:23 AM

#14921

17 minutes between problems

solved· 14.5.24

14.5.24 edit

Picksell Prod June 27, 2025 at 09:06 AM

#14920

1 minute between problems

solved· 2.6.37 in 4 minutes 39 seconds

2.6.37 edit

Picksell Prod June 27, 2025 at 09:04 AM

#14919

2.6.37 edit

Picksell Prod June 27, 2025 at 09:03 AM

#14918

2.6.37 edit

Picksell Prod June 27, 2025 at 09:02 AM

#14917

2.6.37 edit

Picksell Prod June 27, 2025 at 09:02 AM

#14916

2.6.37 edit

Picksell Prod June 27, 2025 at 09:00 AM

#14915

43 minutes between problems

solved· 6.4.18

6.4.18 new solution

jzmicer June 27, 2025 at 08:16 AM

#14914

44 minutes between problems

solved· 7.2.2 in 33 minutes 47 seconds

7.2.2 edit

emixter June 27, 2025 at 07:32 AM

#14913

7.2.2 new solution

emixter June 27, 2025 at 06:58 AM

#14912

10 hours 44 minutes between problems

solved· 2.6.35 in 6 minutes 37 seconds

2.6.35 edit

Picksell Prod June 26, 2025 at 08:14 PM

#14911

2.6.35 edit

Picksell Prod June 26, 2025 at 08:08 PM

#14910

2.6.35 new solution

Picksell Prod June 26, 2025 at 08:08 PM

#14909

7 hours 45 minutes between problems

solved· 3.9.19 in 2 minutes 7 seconds

3.9.19 edit

Picksell Prod June 26, 2025 at 12:22 PM

#14908

3.9.19 edit

Picksell Prod June 26, 2025 at 12:21 PM

#14907

3.9.19 new solution

Picksell Prod June 26, 2025 at 12:20 PM

#14906

27 minutes between problems

solved· 2.4.34 in 27 seconds

2.4.34 edit

Picksell Prod June 26, 2025 at 11:53 AM

#14905

2.4.34 edit

Picksell Prod June 26, 2025 at 11:52 AM

#14904

15 hours 44 minutes between problems

solved· 2.2.7

2.2.7 edit

astrosander June 25, 2025 at 08:08 PM

#14903

34 minutes between problems

solved· 9.3.5 in 26 minutes 9 seconds

9.3.5 edit

jzmicer June 25, 2025 at 07:33 PM

#14902

9.3.5 new solution

jzmicer June 25, 2025 at 07:07 PM

#14901

9 minutes between problems

solved· 9.3.4 in 36 minutes 47 seconds

9.3.4 edit

jzmicer June 25, 2025 at 06:57 PM

#14900

9.3.4 new solution

jzmicer June 25, 2025 at 06:20 PM

#14899

3 hours 23 minutes between problems

solved· 2.2.7

2.2.7 edit

Anonymous June 25, 2025 at 02:57 PM

#14898

2 hours 15 minutes between problems

solved· 9.2.22 in 34 minutes 56 seconds

9.2.22 edit

jzmicer June 25, 2025 at 12:41 PM

#14897

9.2.22 new solution

jzmicer June 25, 2025 at 12:06 PM

#14896

10 minutes between problems

solved· 9.2.20 in 3 hours 1 minute

9.2.20 edit

jzmicer June 25, 2025 at 11:56 AM

#14895

9.2.20 new solution

jzmicer June 25, 2025 at 08:54 AM

#14894

8 minutes between problems

solved· 2.6.29 in 31 seconds

2.6.29 edit

astrosander June 25, 2025 at 08:46 AM

#14893

2.6.29 edit

astrosander June 25, 2025 at 08:45 AM

#14892

1 minute between problems

solved· 14.2.1 in 11 hours 37 minutes

14.2.1 edit

astrosander June 25, 2025 at 08:43 AM

#14891

14.2.1 edit

astrosander June 25, 2025 at 08:43 AM

#14890

14.2.1 edit

emixter June 25, 2025 at 05:56 AM

#14889

14.2.1 edit

ar4senN June 24, 2025 at 09:06 PM

#14888

29 minutes between problems

solved· 2.6.29

2.6.29 edit

ar4senN June 24, 2025 at 08:37 PM

#14887

1 day 18 hours between problems

solved· 11.5.9 in 13 minutes 48 seconds

11.5.9 edit

igor June 23, 2025 at 02:12 AM

#14886

11.5.9 new solution

igor June 23, 2025 at 01:58 AM

#14885

14 minutes between problems

solved· 11.5.8 in 19 minutes 18 seconds

11.5.8 edit

igor June 23, 2025 at 01:44 AM

#14884

11.5.8 new solution

igor June 23, 2025 at 01:24 AM

#14883

7 minutes between problems

solved· 11.5.6

11.5.6 edit

igor June 23, 2025 at 01:17 AM

#14882

5 minutes between problems

solved· 11.5.5 in 17 minutes 31 seconds

11.5.5 edit

igor June 23, 2025 at 01:12 AM

#14881

11.5.5 new solution

igor June 23, 2025 at 12:54 AM

#14880

27 minutes between problems

solved· 2.5.9

2.5.9 edit

igor June 23, 2025 at 12:27 AM

#14879

2 minutes between problems

solved· 11.5.3 in 28 minutes 58 seconds

11.5.3 edit

igor June 23, 2025 at 12:24 AM

#14878

11.5.3 new solution

igor June 22, 2025 at 11:55 PM

#14877

1 hour 30 minutes between problems

solved· 5.11.3 in 3 minutes 20 seconds

5.11.3 edit

Picksell Prod June 22, 2025 at 10:25 PM

#14876

5.11.3 new solution

Picksell Prod June 22, 2025 at 10:21 PM

#14875

38 minutes between problems

solved· 4.2.10 in 5 minutes 18 seconds

4.2.10 edit

Picksell Prod June 22, 2025 at 09:43 PM

#14874

4.2.10 edit

Picksell Prod June 22, 2025 at 09:41 PM

#14873

4.2.10 new solution

Picksell Prod June 22, 2025 at 09:37 PM

#14872

1 hour 12 minutes between problems

solved· 13.1.20

13.1.20 comment

emixter June 22, 2025 at 08:25 PM

thread

19 minutes between problems

solved· 11.1.1

11.1.1 comment

emixter June 22, 2025 at 08:05 PM

thread

21 minutes between problems

solved· 14.2.1

14.2.1 comment

emixter June 22, 2025 at 07:43 PM

thread

2 minutes between problems

solved· 14.5.24

14.5.24 comment

emixter June 22, 2025 at 07:40 PM

thread

12 minutes between problems

solved· 3.9.21

3.9.21 comment

emixter June 22, 2025 at 07:28 PM

thread

10 minutes between problems

solved· 5.9.12

5.9.12 comment

emixter June 22, 2025 at 07:17 PM

thread

17 minutes between problems

solved· 5.9.15

5.9.15 comment

emixter June 22, 2025 at 07:00 PM

thread

24 minutes between problems

solved· 13.1.7

13.1.7 comment

emixter June 22, 2025 at 06:36 PM

thread

22 minutes between problems

solved· 13.1.11

13.1.11 comment

emixter June 22, 2025 at 06:13 PM

thread

8 minutes between problems

solved· 13.1.20 in 2 hours 40 minutes

13.1.20 edit

Picksell Prod June 22, 2025 at 06:05 PM

#14871

13.1.20 comment

emixter June 22, 2025 at 05:33 PM

thread

13.1.20 edit

Picksell Prod June 22, 2025 at 03:27 PM

#14870

13.1.20 edit

Picksell Prod June 22, 2025 at 03:26 PM

#14869

13.1.20 new solution

Picksell Prod June 22, 2025 at 03:24 PM

#14868

2 hours 16 minutes between problems

solved· 13.1.11 in 1 minute 44 seconds

13.1.11 edit

Picksell Prod June 22, 2025 at 01:07 PM

#14867

13.1.11 edit

Picksell Prod June 22, 2025 at 01:07 PM

#14866

13.1.11 new solution

Picksell Prod June 22, 2025 at 01:06 PM

#14865

10 minutes between problems

solved· 9.2.17 in 17 hours 27 minutes

9.2.17 edit

jzmicer June 22, 2025 at 12:55 PM

#14864

9.2.17 edit

jzmicer June 22, 2025 at 11:38 AM

#14863

9.2.17 edit

jzmicer June 22, 2025 at 09:03 AM

#14862

9.2.17 edit

jzmicer June 21, 2025 at 07:27 PM

#14861

1 hour 44 minutes between problems

solved· 13.1.7 in 1 minute 8 seconds

13.1.7 edit

Picksell Prod June 21, 2025 at 05:43 PM

#14860

13.1.7 new solution

Picksell Prod June 21, 2025 at 05:41 PM

#14859

2 hours 22 minutes between problems

solved· 13.1.4 in 25 seconds

13.1.4 edit

Picksell Prod June 21, 2025 at 03:19 PM

#14858

13.1.4 new solution

Picksell Prod June 21, 2025 at 03:18 PM

#14857

28 minutes between problems

solved· 2.1.64

2.1.64 edit

Anonymous June 21, 2025 at 02:50 PM

#14856

2 hours 15 minutes between problems

solved· 13.1.3 in 1 minute 56 seconds

13.1.3 edit

Picksell Prod June 21, 2025 at 12:34 PM

#14855

13.1.3 edit

Picksell Prod June 21, 2025 at 12:32 PM

#14854

14 hours 40 minutes between problems

solved· 6.6.1 in 11 minutes 1 second

6.6.1 edit

Picksell Prod June 20, 2025 at 09:51 PM

#14853

6.6.1 edit

Picksell Prod June 20, 2025 at 09:48 PM

#14852

6.6.1 new solution

Picksell Prod June 20, 2025 at 09:40 PM

#14851

14 hours 46 minutes between problems

solved· 9.3.2

9.3.2 edit

igor June 20, 2025 at 06:54 AM

#14850

less than a minute between problems

solved· 11.5.4 in 4 hours 53 minutes

11.5.4 edit

igor June 20, 2025 at 06:53 AM

#14849

11.5.4 edit

igor June 20, 2025 at 02:28 AM

#14848

11.5.4 new solution

igor June 20, 2025 at 02:00 AM

#14847

6 minutes between problems

solved· 11.3.5

11.3.5 edit

igor June 20, 2025 at 01:53 AM

#14846

4 hours 8 minutes between problems

solved· 1.3.18

1.3.18 comment

astrosander June 19, 2025 at 09:45 PM

thread

1.3.18 comment

astrosander June 19, 2025 at 09:44 PM

thread

25 minutes between problems

solved· 5.9.20 in 43 seconds

5.9.20 edit

Picksell Prod June 19, 2025 at 09:20 PM

#14845

5.9.20 new solution

Picksell Prod June 19, 2025 at 09:19 PM

#14844

3 hours 9 minutes between problems

solved· 5.9.16 in 17 minutes 25 seconds

5.9.16 edit

Picksell Prod June 19, 2025 at 06:09 PM

#14843

5.9.16 edit

Picksell Prod June 19, 2025 at 06:08 PM

#14842

5.9.16 new solution

Picksell Prod June 19, 2025 at 05:52 PM

#14841

16 minutes between problems

solved· 5.9.15 in 1 minute

5.9.15 edit

Picksell Prod June 19, 2025 at 05:35 PM

#14840

5.9.15 new solution

Picksell Prod June 19, 2025 at 05:34 PM

#14839

25 minutes between problems

solved· 5.9.12 in 2 minutes 50 seconds

5.9.12 edit

Picksell Prod June 19, 2025 at 05:08 PM

#14838

5.9.12 edit

Picksell Prod June 19, 2025 at 05:06 PM

#14837

5.9.12 new solution

Picksell Prod June 19, 2025 at 05:06 PM

#14836

27 minutes between problems

solved· 5.9.13 in 1 minute 43 seconds

5.9.13 edit

Picksell Prod June 19, 2025 at 04:38 PM

#14835

5.9.13 edit

Picksell Prod June 19, 2025 at 04:36 PM

#14834

5.9.13 new solution

Picksell Prod June 19, 2025 at 04:36 PM

#14833

3 hours 1 minute between problems

solved· 3.9.21 in 6 minutes 3 seconds

3.9.21 edit

Picksell Prod June 19, 2025 at 01:35 PM

#14832

3.9.21 edit