Submission #73625249

Source Code Expand

N, M = [*map(int, input().split())]

arrows = [tuple(map(int, input().split())) for _ in range(M)]
s = set(arrows)

print(len([(A, B) for (A, B) in arrows if A < B and (B, A) in s]))

Submission Info

Submission Time
Task B - Investigation of Friend Relationships
User daryll
Language Python (PyPy 3.11-v7.3.20)
Score 266
Code Size 189 Byte
Status AC
Exec Time 340 ms
Memory 154548 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 266 / 266
Status
AC × 3
AC × 76
Set Name Test Cases
Sample sample01.txt, sample02.txt, sample03.txt
All sample01.txt, sample02.txt, sample03.txt, in01.txt, in02.txt, in03.txt, in04.txt, in05.txt, in06.txt, in07.txt, in08.txt, in09.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in29.txt, in30.txt, in31.txt, in32.txt, in33.txt, in34.txt, in35.txt, in36.txt, in37.txt, in38.txt, in39.txt, in40.txt, in41.txt, in42.txt, in43.txt, in44.txt, in45.txt, in46.txt, in47.txt, in48.txt, in49.txt, in50.txt, in51.txt, in52.txt, in53.txt, in54.txt, in55.txt, in56.txt, in57.txt, in58.txt, in59.txt, in60.txt, in61.txt, in62.txt, in63.txt, in64.txt, in65.txt, in66.txt, in67.txt, in68.txt, in69.txt, in70.txt, in71.txt, in72.txt, in73.txt
Case Name Status Exec Time Memory
in01.txt AC 50 ms 79984 KiB
in02.txt AC 51 ms 79600 KiB
in03.txt AC 51 ms 79828 KiB
in04.txt AC 51 ms 80260 KiB
in05.txt AC 57 ms 87728 KiB
in06.txt AC 52 ms 80064 KiB
in07.txt AC 62 ms 91916 KiB
in08.txt AC 307 ms 149296 KiB
in09.txt AC 81 ms 110184 KiB
in10.txt AC 309 ms 144644 KiB
in11.txt AC 300 ms 144812 KiB
in12.txt AC 317 ms 145976 KiB
in13.txt AC 316 ms 144808 KiB
in14.txt AC 297 ms 147424 KiB
in15.txt AC 340 ms 147584 KiB
in16.txt AC 312 ms 146940 KiB
in17.txt AC 296 ms 145180 KiB
in18.txt AC 51 ms 79948 KiB
in19.txt AC 304 ms 144796 KiB
in20.txt AC 329 ms 149368 KiB
in21.txt AC 304 ms 149252 KiB
in22.txt AC 308 ms 149188 KiB
in23.txt AC 305 ms 149348 KiB
in24.txt AC 306 ms 147140 KiB
in25.txt AC 308 ms 144764 KiB
in26.txt AC 309 ms 144780 KiB
in27.txt AC 51 ms 79784 KiB
in28.txt AC 53 ms 79976 KiB
in29.txt AC 62 ms 91904 KiB
in30.txt AC 73 ms 100940 KiB
in31.txt AC 73 ms 102556 KiB
in32.txt AC 72 ms 101008 KiB
in33.txt AC 297 ms 147240 KiB
in34.txt AC 52 ms 80520 KiB
in35.txt AC 57 ms 88148 KiB
in36.txt AC 51 ms 80040 KiB
in37.txt AC 52 ms 79960 KiB
in38.txt AC 57 ms 88904 KiB
in39.txt AC 51 ms 79936 KiB
in40.txt AC 50 ms 79816 KiB
in41.txt AC 51 ms 80008 KiB
in42.txt AC 52 ms 79752 KiB
in43.txt AC 52 ms 79792 KiB
in44.txt AC 303 ms 154548 KiB
in45.txt AC 52 ms 80472 KiB
in46.txt AC 318 ms 145728 KiB
in47.txt AC 310 ms 149180 KiB
in48.txt AC 324 ms 149168 KiB
in49.txt AC 333 ms 150912 KiB
in50.txt AC 335 ms 149540 KiB
in51.txt AC 306 ms 147104 KiB
in52.txt AC 337 ms 147040 KiB
in53.txt AC 336 ms 149520 KiB
in54.txt AC 317 ms 145172 KiB
in55.txt AC 311 ms 144800 KiB
in56.txt AC 305 ms 144988 KiB
in57.txt AC 311 ms 149544 KiB
in58.txt AC 52 ms 79612 KiB
in59.txt AC 51 ms 79752 KiB
in60.txt AC 51 ms 79684 KiB
in61.txt AC 51 ms 79752 KiB
in62.txt AC 52 ms 79536 KiB
in63.txt AC 52 ms 79752 KiB
in64.txt AC 52 ms 79908 KiB
in65.txt AC 63 ms 91904 KiB
in66.txt AC 64 ms 91944 KiB
in67.txt AC 53 ms 79924 KiB
in68.txt AC 52 ms 79804 KiB
in69.txt AC 52 ms 79904 KiB
in70.txt AC 52 ms 80076 KiB
in71.txt AC 52 ms 79932 KiB
in72.txt AC 52 ms 79932 KiB
in73.txt AC 311 ms 147116 KiB
sample01.txt AC 52 ms 79908 KiB
sample02.txt AC 52 ms 79804 KiB
sample03.txt AC 52 ms 80088 KiB