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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
#764974#8023. The Journey of Geor AutumnlarryyuAC ✓229ms316220kbC++20864b2024-11-20 11:26:042024-11-20 11:26:05

Judging History

你现在查看的是最新测评结果

  • [2024-11-20 11:26:05]
  • 评测
  • 测评结果:AC
  • 用时:229ms
  • 内存:316220kb
  • [2024-11-20 11:26:04]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mo=998244353;
int n,k;
int f[10000010],s[10000010];
int fac[10000010],inv[10000010];
int po(int x,int y){
	int z=1;
	while(y){
		if(y%2) z=z*x%mo;
		x=x*x%mo;
		y/=2;
	}
	return z;
}
struct Mod{
	int m,p;
	void init(int pp){
		m=((__int128)1ll<<64)/pp;p=pp;
	}
	int operator()(int x){
		return x-((__int128(x)*m)>>64)*p;
	}
}mod;
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(nullptr);
	mod.init(998244353);
	cin>>n>>k;
	fac[0]=inv[0]=1;
	for(int i=1;i<=n;i++){
		fac[i]=mod(fac[i-1]*i);
	}
	inv[n]=po(fac[n],mo-2);
	for(int i=n-1;i;i--){
		inv[i]=mod(inv[i+1]*(i+1));
	}
	s[0]=fac[n-1];
	for(int i=1;i<=n;i++){
		f[i]=mod((i<=k?s[i-1]:mod(s[i-1]-s[i-k-1]))*inv[n-i]);
		s[i]=mod(s[i-1]+mod(f[i]*fac[n-i-1]));
	}
	cout<<f[n];
	return 0;
}

这程序好像有点Bug,我给组数据试试?

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 9692kb

input:

1 1

output:

1

result:

ok "1"

Test #2:

score: 0
Accepted
time: 1ms
memory: 9812kb

input:

1 2

output:

1

result:

ok "1"

Test #3:

score: 0
Accepted
time: 1ms
memory: 9736kb

input:

1 3

output:

1

result:

ok "1"

Test #4:

score: 0
Accepted
time: 0ms
memory: 9688kb

input:

1 4

output:

1

result:

ok "1"

Test #5:

score: 0
Accepted
time: 0ms
memory: 9864kb

input:

2 1

output:

1

result:

ok "1"

Test #6:

score: 0
Accepted
time: 1ms
memory: 9692kb

input:

2 2

output:

2

result:

ok "2"

Test #7:

score: 0
Accepted
time: 1ms
memory: 9804kb

input:

2 3

output:

2

result:

ok "2"

Test #8:

score: 0
Accepted
time: 1ms
memory: 9816kb

input:

2 4

output:

2

result:

ok "2"

Test #9:

score: 0
Accepted
time: 1ms
memory: 9804kb

input:

3 1

output:

1

result:

ok "1"

Test #10:

score: 0
Accepted
time: 1ms
memory: 9808kb

input:

3 2

output:

4

result:

ok "4"

Test #11:

score: 0
Accepted
time: 1ms
memory: 9824kb

input:

3 3

output:

6

result:

ok "6"

Test #12:

score: 0
Accepted
time: 1ms
memory: 9828kb

input:

3 4

output:

6

result:

ok "6"

Test #13:

score: 0
Accepted
time: 1ms
memory: 9684kb

input:

4 1

output:

1

result:

ok "1"

Test #14:

score: 0
Accepted
time: 1ms
memory: 9744kb

input:

4 2

output:

10

result:

ok "10"

Test #15:

score: 0
Accepted
time: 1ms
memory: 9780kb

input:

4 3

output:

18

result:

ok "18"

Test #16:

score: 0
Accepted
time: 1ms
memory: 9748kb

input:

4 4

output:

24

result:

ok "24"

Test #17:

score: 0
Accepted
time: 1ms
memory: 9824kb

input:

99 50

output:

955866606

result:

ok "955866606"

Test #18:

score: 0
Accepted
time: 1ms
memory: 9824kb

input:

99 70

output:

296999003

result:

ok "296999003"

Test #19:

score: 0
Accepted
time: 0ms
memory: 9812kb

input:

1034 998

output:

637688669

result:

ok "637688669"

Test #20:

score: 0
Accepted
time: 0ms
memory: 9888kb

input:

1099 997

output:

712935289

result:

ok "712935289"

Test #21:

score: 0
Accepted
time: 0ms
memory: 9888kb

input:

10314 998

output:

224695890

result:

ok "224695890"

Test #22:

score: 0
Accepted
time: 1ms
memory: 11956kb

input:

10929 9974

output:

160291286

result:

ok "160291286"

Test #23:

score: 0
Accepted
time: 2ms
memory: 12592kb

input:

103124 99448

output:

695932649

result:

ok "695932649"

Test #24:

score: 0
Accepted
time: 4ms
memory: 12720kb

input:

109139 9937

output:

268916696

result:

ok "268916696"

Test #25:

score: 0
Accepted
time: 25ms
memory: 40748kb

input:

1031234 99238

output:

441457721

result:

ok "441457721"

Test #26:

score: 0
Accepted
time: 22ms
memory: 44488kb

input:

1091239 991237

output:

61047495

result:

ok "61047495"

Test #27:

score: 0
Accepted
time: 228ms
memory: 316096kb

input:

10000000 9982443

output:

224744113

result:

ok "224744113"

Test #28:

score: 0
Accepted
time: 229ms
memory: 316220kb

input:

9999977 5678901

output:

641748125

result:

ok "641748125"

Extra Test:

score: 0
Extra Test Passed