QOJ.ac
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 |
|---|---|---|---|---|---|---|---|---|---|
| #784231 | #1085. Brave Seekers of Unicorns | ydzr00000 | AC ✓ | 66ms | 23144kb | C++17 | 715b | 2024-11-26 14:12:58 | 2024-11-26 14:12:59 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int mod=998244353;
inline int Add(const int &x,const int &y){return x+y>=mod?x+y-mod:x+y;}
inline int Minus(const int &x,const int &y){return x-y<0?x-y+mod:x-y;}
long long f[1000001],sum[1000001];
int pw[21],hb[1000001];
int main(){
pw[0]=1;
for(int i=1;i<=20;i++)
pw[i]=pw[i-1]*2;
int n;
cin>>n;
hb[0]=-1;
for(int i=1;i<=n;i++)
{
f[i]=Add(sum[i-1],1);
hb[i]=hb[i>>1]+1;
for(int k=0;k<hb[i];k++)
if((i>>k)&1)
f[i]=Minus(f[i],Minus(sum[pw[k+1]-1],sum[pw[k]-1]));
sum[i]=Add(sum[i-1],f[i]);
}
cout<<sum[n]<<endl;
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 7704kb
input:
1
output:
1
result:
ok 1 number(s): "1"
Test #2:
score: 0
Accepted
time: 1ms
memory: 7716kb
input:
2
output:
3
result:
ok 1 number(s): "3"
Test #3:
score: 0
Accepted
time: 1ms
memory: 7592kb
input:
3
output:
6
result:
ok 1 number(s): "6"
Test #4:
score: 0
Accepted
time: 1ms
memory: 7588kb
input:
5
output:
26
result:
ok 1 number(s): "26"
Test #5:
score: 0
Accepted
time: 1ms
memory: 7688kb
input:
322
output:
782852421
result:
ok 1 number(s): "782852421"
Test #6:
score: 0
Accepted
time: 1ms
memory: 7784kb
input:
10
output:
728
result:
ok 1 number(s): "728"
Test #7:
score: 0
Accepted
time: 0ms
memory: 7704kb
input:
100
output:
234222727
result:
ok 1 number(s): "234222727"
Test #8:
score: 0
Accepted
time: 2ms
memory: 9784kb
input:
10000
output:
348787098
result:
ok 1 number(s): "348787098"
Test #9:
score: 0
Accepted
time: 66ms
memory: 23124kb
input:
1000000
output:
246427510
result:
ok 1 number(s): "246427510"
Test #10:
score: 0
Accepted
time: 66ms
memory: 23144kb
input:
999999
output:
525546416
result:
ok 1 number(s): "525546416"
Test #11:
score: 0
Accepted
time: 63ms
memory: 22728kb
input:
950000
output:
154241852
result:
ok 1 number(s): "154241852"
Test #12:
score: 0
Accepted
time: 57ms
memory: 23124kb
input:
999888
output:
254589934
result:
ok 1 number(s): "254589934"
Test #13:
score: 0
Accepted
time: 58ms
memory: 23116kb
input:
999423
output:
917909701
result:
ok 1 number(s): "917909701"
Test #14:
score: 0
Accepted
time: 32ms
memory: 19148kb
input:
600000
output:
546076071
result:
ok 1 number(s): "546076071"
Test #15:
score: 0
Accepted
time: 1ms
memory: 7592kb
input:
1337
output:
616951443
result:
ok 1 number(s): "616951443"