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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 |
---|---|---|---|---|---|---|---|---|---|
#764974 | #8023. The Journey of Geor Autumn | larryyu | AC ✓ | 229ms | 316220kb | C++20 | 864b | 2024-11-20 11:26:04 | 2024-11-20 11:26:05 |
Judging History
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?
詳細信息
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