CSES - Aalto Competitive Programming 2026 - wk8 - Wed

Submission details
Task:	A TIMES B!
Sender:	aalto26hw_007
Submission time:	2026-10-28 22:24:05 +0200
Language:	Python3 (CPython3)
Status:	READY
Result:	TIME LIMIT EXCEEDED

Test results
test	verdict	time
#1	ACCEPTED	0.02 s	details
#2	ACCEPTED	0.02 s	details
#3	ACCEPTED	0.02 s	details
#4	ACCEPTED	0.02 s	details
#5	ACCEPTED	0.02 s	details
#6	ACCEPTED	0.02 s	details
#7	ACCEPTED	0.02 s	details
#8	ACCEPTED	0.02 s	details
#9	ACCEPTED	0.02 s	details
#10	ACCEPTED	0.02 s	details
#11	ACCEPTED	0.02 s	details
#12	ACCEPTED	0.02 s	details
#13	ACCEPTED	0.02 s	details
#14	ACCEPTED	0.02 s	details
#15	ACCEPTED	0.02 s	details
#16	ACCEPTED	0.02 s	details
#17	ACCEPTED	0.02 s	details
#18	ACCEPTED	0.02 s	details
#19	ACCEPTED	0.02 s	details
#20	ACCEPTED	0.02 s	details
#21	ACCEPTED	0.02 s	details
#22	ACCEPTED	0.02 s	details
#23	ACCEPTED	0.02 s	details
#24	ACCEPTED	0.02 s	details
#25	ACCEPTED	0.02 s	details
#26	ACCEPTED	0.02 s	details
#27	ACCEPTED	0.02 s	details
#28	ACCEPTED	0.02 s	details
#29	ACCEPTED	0.02 s	details
#30	ACCEPTED	0.02 s	details
#31	ACCEPTED	0.02 s	details
#32	ACCEPTED	0.02 s	details
#33	ACCEPTED	0.02 s	details
#34	ACCEPTED	0.02 s	details
#35	ACCEPTED	0.02 s	details
#36	ACCEPTED	0.02 s	details
#37	ACCEPTED	0.02 s	details
#38	ACCEPTED	0.02 s	details
#39	ACCEPTED	0.02 s	details
#40	ACCEPTED	0.02 s	details
#41	ACCEPTED	0.02 s	details
#42	ACCEPTED	0.02 s	details
#43	ACCEPTED	0.02 s	details
#44	ACCEPTED	0.02 s	details
#45	ACCEPTED	0.02 s	details
#46	ACCEPTED	0.02 s	details
#47	ACCEPTED	0.02 s	details
#48	ACCEPTED	0.02 s	details
#49	ACCEPTED	0.02 s	details
#50	ACCEPTED	0.02 s	details
#51	ACCEPTED	0.02 s	details
#52	ACCEPTED	0.02 s	details
#53	ACCEPTED	0.02 s	details
#54	ACCEPTED	0.02 s	details
#55	ACCEPTED	0.02 s	details
#56	ACCEPTED	0.32 s	details
#57	ACCEPTED	0.35 s	details
#58	ACCEPTED	0.35 s	details
#59	ACCEPTED	0.30 s	details
#60	ACCEPTED	0.15 s	details
#61	TIME LIMIT EXCEEDED	--	details
#62	TIME LIMIT EXCEEDED	--	details
#63	TIME LIMIT EXCEEDED	--	details
#64	TIME LIMIT EXCEEDED	--	details
#65	TIME LIMIT EXCEEDED	--	details

Code

# import sys
# from decimal import Decimal, Context, setcontext, MAX_PREC, MAX_EMAX
# setcontext(Context(prec=MAX_PREC, Emax=MAX_EMAX))
# a, b = sys.stdin.read().split()
# print(Decimal(a) * Decimal(b))

import sys
sys.set_int_max_str_digits(0)
def kmul(x, y):
    n = max(x.bit_length(), y.bit_length())
    if n <= 512:                      # base case: small enough for builtin
        return x * y
    h = n // 2
    mask = (1 << h) - 1
    x1, x0 = x >> h, x & mask
    y1, y0 = y >> h, y & mask
    z0 = kmul(x0, y0)
    z2 = kmul(x1, y1)
    z1 = kmul(x0 + x1, y0 + y1) - z0 - z2
    return (z2 << (2 * h)) + (z1 << h) + z0

a, b = sys.stdin.read().split()
print(kmul(int(a), int(b)))

Test details

Test 1

Verdict: ACCEPTED

input
`8 5` view save

correct output
`40` view save

user output
`40` view save

Test 2

Verdict: ACCEPTED

input
`9 1` view save

correct output
`9` view save

user output
`9` view save

Test 3

Verdict: ACCEPTED

input
`9 5` view save

correct output
`45` view save

user output
`45` view save

Test 4

Verdict: ACCEPTED

input
`2 5` view save

correct output
`10` view save

user output
`10` view save

Test 5

Verdict: ACCEPTED

input
`8 7` view save

correct output
`56` view save

user output
`56` view save

Test 6

Verdict: ACCEPTED

input
`48 92` view save

correct output
`4416` view save

user output
`4416` view save

Test 7

Verdict: ACCEPTED

input
`1 40` view save

correct output
`40` view save

user output
`40` view save

Test 8

Verdict: ACCEPTED

input
`97 74` view save

correct output
`7178` view save

user output
`7178` view save

Test 9

Verdict: ACCEPTED

input
`58 8` view save

correct output
`464` view save

user output
`464` view save

Test 10

Verdict: ACCEPTED

input
`15 24` view save

correct output
`360` view save

user output
`360` view save

Test 11

Verdict: ACCEPTED

input
`4 7` view save

correct output
`28` view save

user output
`28` view save

Test 12

Verdict: ACCEPTED

input
`906 417` view save

correct output
`377802` view save

user output
`377802` view save

Test 13

Verdict: ACCEPTED

input
`778 105` view save

correct output
`81690` view save

user output
`81690` view save

Test 14

Verdict: ACCEPTED

input
`2 989` view save

correct output
`1978` view save

user output
`1978` view save

Test 15

Verdict: ACCEPTED

input
`2830 5329` view save

correct output
`15081070` view save

user output
`15081070` view save

Test 16

Verdict: ACCEPTED

input
`9 51382` view save

correct output
`462438` view save

user output
`462438` view save

Test 17

Verdict: ACCEPTED

input
`25053 71372` view save

correct output
`1788082716` view save

user output
`1788082716` view save

Test 18

Verdict: ACCEPTED

input
`258180 674616` view save

correct output
`174172358880` view save

user output
`174172358880` view save

Test 19

Verdict: ACCEPTED

input
`8821 2` view save

correct output
`17642` view save

user output
`17642` view save

Test 20

Verdict: ACCEPTED

input
`1742712 9600618` view save

correct output
`16731112196016` view save

user output
`16731112196016` view save

Test 21

Verdict: ACCEPTED

input
`8898606 2936506` view save

correct output
`26130809910636` view save

user output
`26130809910636` view save

Test 22

Verdict: ACCEPTED

input
`82670092 60138633` view save

correct output
`4971666322864236` view save

user output
`4971666322864236` view save

Test 23

Verdict: ACCEPTED

input
`54746871 83822602` view save

correct output
`4589025178578342` view save

user output
`4589025178578342` view save

Test 24

Verdict: ACCEPTED

input
`477252461 1032684` view save

correct output
`492850980435324` view save

user output
`492850980435324` view save

Test 25

Verdict: ACCEPTED

input
`5932935 379` view save

correct output
`2248582365` view save

user output
`2248582365` view save

Test 26

Verdict: ACCEPTED

input
`620114 3126641` view save

correct output
`1938873857074` view save

user output
`1938873857074` view save

Test 27

Verdict: ACCEPTED

input
`452757081 222748761` view save

correct output
`100851078826726641` view save

user output
`100851078826726641` view save

Test 28

Verdict: ACCEPTED

input
`689748332 888826746` view save

correct output
`613066765490487672` view save

user output
`613066765490487672` view save

Test 29

Verdict: ACCEPTED

input
`111337 25` view save

correct output
`2783425` view save

user output
`2783425` view save

Test 30

Verdict: ACCEPTED

input
`809 84435378` view save

correct output
`68308220802` view save

user output
`68308220802` view save

Test 31

Verdict: ACCEPTED

input
`9641697369926504411 425970950212942028697061039529...` view save

correct output
`410708299033321711216812810174...` view save

user output
`410708299033321711216812810174...` view save

Test 32

Verdict: ACCEPTED

input
`793769623129909085108356241071...` view save

correct output
`264404012608186879272715560773...` view save

user output
`264404012608186879272715560773...` view save

Test 33

Verdict: ACCEPTED

input
`8539777831492675800 436` view save

correct output
`3723343134530806648800` view save

user output
`3723343134530806648800` view save

Test 34

Verdict: ACCEPTED

input
`946492187160898604892390431179...` view save

correct output
`585982368537725512535970251461...` view save

user output
`585982368537725512535970251461...` view save

Test 35

Verdict: ACCEPTED

input
`874046401974324184707688863838...` view save

correct output
`174556202198322810668657866310...` view save

user output
`174556202198322810668657866310...` view save

Test 36

Verdict: ACCEPTED

input
`168584663428092347854539803060...` view save

correct output
`235958453587245776929148968707...` view save

user output
`235958453587245776929148968707...` view save

Test 37

Verdict: ACCEPTED

input
`279013912031336395843652482056...` view save

correct output
`856375236460411618343887929304...` view save

user output
`856375236460411618343887929304...` view save

Test 38

Verdict: ACCEPTED

input
`909594443312661242668561455177...` view save

correct output
`801297086685128929836268694647...` view save

user output
`801297086685128929836268694647...` view save

Test 39

Verdict: ACCEPTED

input
`521558480102200460144622364590...` view save

correct output
`403176935665359352292583479223...` view save

user output
`403176935665359352292583479223...` view save

Test 40

Verdict: ACCEPTED

input
`198766521920629467015839613580...` view save

correct output
`197951285207558548760833360414...` view save

user output
`197951285207558548760833360414...` view save

Test 41

Verdict: ACCEPTED

input
`388239940637354291806784217812...` view save

correct output
`354893636094929851749498258576...` view save

user output
`354893636094929851749498258576...` view save

Test 42

Verdict: ACCEPTED

input
`580031950564534684773525167998...` view save

correct output
`225288306472433597677862095876...` view save

user output
`225288306472433597677862095876...` view save

Test 43

Verdict: ACCEPTED

input
`673497493525004204568833306269...` view save

correct output
`104167516519697053781119530996...` view save

user output
`104167516519697053781119530996...` view save

Test 44

Verdict: ACCEPTED

input
`583582406474458495157747860432...` view save

correct output
`355985267949419682046226194863...` view save

user output
`355985267949419682046226194863...` view save

Test 45

Verdict: ACCEPTED

input
`154401310284121033413839709675...` view save

correct output
`472687322036571910421947159369...` view save

user output
`472687322036571910421947159369...` view save

Test 46

Verdict: ACCEPTED

input
`964784520177212016698 135881607827957154173561484162...` view save

correct output
`131096471809203739325264543904...` view save

user output
`131096471809203739325264543904...` view save

Test 47

Verdict: ACCEPTED

input
`506417941420848908877158785176...` view save

correct output
`124940484872553056181800567857...` view save

user output
`124940484872553056181800567857...` view save

Test 48

Verdict: ACCEPTED

input
`278205703909200971326699489015...` view save

correct output
`213362541886605761113025837459...` view save

user output
`213362541886605761113025837459...` view save

Test 49

Verdict: ACCEPTED

input
`488919747667763730629078434642...` view save

correct output
`244261035002054726047225565934...` view save

user output
`244261035002054726047225565934...` view save

Test 50

Verdict: ACCEPTED

input
`683013292533355268532590162229...` view save

correct output
`271255985219635665074840248062...` view save

user output
`271255985219635665074840248062...` view save

Test 51

Verdict: ACCEPTED

input
`701382950383712289025758984281...` view save

correct output
`396240397875971182850884660551...` view save

user output
`396240397875971182850884660551...` view save

Test 52

Verdict: ACCEPTED

input
`950530137216618089651057517232...` view save

correct output
`525100658977646195130452101103...` view save

user output
`525100658977646195130452101103...` view save

Test 53

Verdict: ACCEPTED

input
`758180874616256083097058082046...` view save

correct output
`612777382638418549100062437996...` view save

user output
`612777382638418549100062437996...` view save

Test 54

Verdict: ACCEPTED

input
`282198270649528096385750216226...` view save

correct output
`878945962031578099916769892430...` view save

user output
`878945962031578099916769892430...` view save

Test 55

Verdict: ACCEPTED

input
`374271236006180996628555027124...` view save

correct output
`205927043926518428842129271440...` view save

user output
`205927043926518428842129271440...` view save

Test 56

Verdict: ACCEPTED

input
`789860669365068182777748873091...` view save

correct output
`369460448033120451265094062370...` view save

user output
`369460448033120451265094062370...` view save

Test 57

Verdict: ACCEPTED

input
`826700926013863385104801713448...` view save

correct output
`291751287859134397942962144651...` view save

user output
`291751287859134397942962144651...` view save

Test 58

Verdict: ACCEPTED

input
`947468718382260248801518078140...` view save

correct output
`226868697296935607336651841496...` view save

user output
`226868697296935607336651841496...` view save

Test 59

Verdict: ACCEPTED

input
`177252461103268440789803954968...` view save

correct output
`111876380249200192763403085310...` view save

user output
`111876380249200192763403085310...` view save

Test 60

Verdict: ACCEPTED

input
`393293577943612353036749957226...` view save

correct output
`336630505716557163667422969707...` view save

user output
`336630505716557163667422969707...` view save

Test 61

Verdict: TIME LIMIT EXCEEDED

input
`320114112664152374910455416563...` view save

correct output
`136407754249269979820422504376...` view save

user output
(empty)

Test 62

Verdict: TIME LIMIT EXCEEDED

input
`152757081122748761316522074282...` view save

correct output
`107712372482584798763194835348...` view save

user output
(empty)

Test 63

Verdict: TIME LIMIT EXCEEDED

input
`889748332988826746683887083103...` view save

correct output
`729454517423131565738173030712...` view save

user output
(empty)

Test 64

Verdict: TIME LIMIT EXCEEDED

input
`311337350148998951898280698942...` view save

correct output
`245742878826375358332482490843...` view save

user output
(empty)

Test 65

Verdict: TIME LIMIT EXCEEDED

input
`709744353788876782171034561202...` view save

correct output
`198288295923437797210097622398...` view save

user output
(empty)

Aalto Competitive Programming 2026 - wk8 - Wed

A TIMES B!

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

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Test 24

Test 25

Test 26

Test 27

Test 28

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Test 34

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Test 36

Test 37

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Test 39

Test 40

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Test 44

Test 45

Test 46

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Test 48

Test 49

Test 50

Test 51

Test 52

Test 53

Test 54

Test 55

Test 56

Test 57

Test 58

Test 59

Test 60

Test 61

Test 62

Test 63

Test 64

Test 65

Tasks

Submissions (aalto26hw_007)