Submission #13,996

2025-01-09 15:47:00

python3

Accepted 50/50

30ms

4388 KiB

N,K=map(int,input().split())
A=sum(map(int,input().split()))
if A<K:print(0)
else:print((A*(A-1)-(2*A-K+1)*(K-2))//2)

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	16ms	2868 KiB
		2	Accepted	0/0	16ms	2868 KiB
		3	Accepted	0/0	29ms	4380 KiB
		4	Accepted	2/2	16ms	2868 KiB
		5	Accepted	2/2	16ms	2868 KiB
		6	Accepted	2/2	17ms	2932 KiB
		7	Accepted	3/3	16ms	2872 KiB
		8	Accepted	3/3	14ms	2868 KiB
		9	Accepted	3/3	17ms	3064 KiB
		10	Accepted	2/2	16ms	3076 KiB
		11	Accepted	3/3	16ms	3072 KiB
		12	Accepted	2/2	14ms	3072 KiB
		13	Accepted	3/3	14ms	2924 KiB
		14	Accepted	2/2	28ms	4092 KiB
		15	Accepted	2/2	30ms	3940 KiB
		16	Accepted	3/3	30ms	4324 KiB
		17	Accepted	3/3	30ms	3940 KiB
		18	Accepted	3/3	30ms	4216 KiB
		19	Accepted	3/3	29ms	4300 KiB
		20	Accepted	3/3	30ms	4212 KiB
		21	Accepted	3/3	29ms	4136 KiB
		22	Accepted	3/3	29ms	4388 KiB