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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #209141 | #6736. Alice and Bob | luhanning | TL | 78ms | 9140kb | Python3 | 337b | 2023-10-10 10:38:43 | 2023-10-10 10:38:44 |
Judging History
answer
def factorial(num1,num2):
a=1
#for循环遍历
for i in range(0,num1):
a*=(num2-i)
if num1 == 0:
a = 1
return a
n = int(input())
ans = 0
p = 998244353
for j in range(1,n+1):
if n-j >= j-1:
a = factorial(n-j,n-j)
b = factorial(j-1,n-j)
ans+=a*b
print(ans%p)
详细
Test #1:
score: 100
Accepted
time: 10ms
memory: 8976kb
input:
1
output:
1
result:
ok 1 number(s): "1"
Test #2:
score: 0
Accepted
time: 9ms
memory: 9040kb
input:
2
output:
1
result:
ok 1 number(s): "1"
Test #3:
score: 0
Accepted
time: 14ms
memory: 9064kb
input:
10
output:
997920
result:
ok 1 number(s): "997920"
Test #4:
score: 0
Accepted
time: 6ms
memory: 9040kb
input:
100
output:
188898954
result:
ok 1 number(s): "188898954"
Test #5:
score: 0
Accepted
time: 4ms
memory: 9008kb
input:
4
output:
10
result:
ok 1 number(s): "10"
Test #6:
score: 0
Accepted
time: 9ms
memory: 9140kb
input:
8
output:
12336
result:
ok 1 number(s): "12336"
Test #7:
score: 0
Accepted
time: 15ms
memory: 9068kb
input:
16
output:
373118483
result:
ok 1 number(s): "373118483"
Test #8:
score: 0
Accepted
time: 14ms
memory: 9136kb
input:
32
output:
314585464
result:
ok 1 number(s): "314585464"
Test #9:
score: 0
Accepted
time: 7ms
memory: 9036kb
input:
64
output:
627827331
result:
ok 1 number(s): "627827331"
Test #10:
score: 0
Accepted
time: 14ms
memory: 9040kb
input:
128
output:
828497685
result:
ok 1 number(s): "828497685"
Test #11:
score: 0
Accepted
time: 16ms
memory: 9140kb
input:
256
output:
65697890
result:
ok 1 number(s): "65697890"
Test #12:
score: 0
Accepted
time: 26ms
memory: 9048kb
input:
512
output:
854187619
result:
ok 1 number(s): "854187619"
Test #13:
score: 0
Accepted
time: 78ms
memory: 9032kb
input:
1024
output:
513823539
result:
ok 1 number(s): "513823539"
Test #14:
score: -100
Time Limit Exceeded
input:
1361956