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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 |
---|---|---|---|---|---|---|---|---|---|
#685487 | #9515. 无限地狱 | 275307894a | 77 | 2503ms | 12528kb | C++14 | 2.8kb | 2024-10-28 19:41:29 | 2024-10-28 19:41:29 |
Judging History
answer
#include<bits/stdc++.h>
#define Gc() getchar()
#define Me(x,y) memset(x,y,sizeof(x))
#define Mc(x,y) memcpy(x,y,sizeof(x))
#define d(x,y) ((m)*(x-1)+(y))
#define R(n) (rnd()%(n)+1)
#define Pc(x) putchar(x)
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define eb emplace_back
#define all(x) x.begin(),x.end()
using namespace std;using ll=long long;using db=double;using lb=long db;using ui=unsigned;using ull=unsigned long long;using pii=pair<int,int>;
const int N=1e6+5,M=N*120+5,K=1000+5,mod=998244353,Mod=mod-1;const db eps=1e-9;const int INF=1e9+7;mt19937 rnd(263082);
#define Tp template<typename T>
#define Ts template<typename T,typename... Ar>
namespace Debug{
Tp void _debug(char* f,T t){cerr<<f<<'='<<t<<endl;}
Ts void _debug(char* f,T x,Ar... y){while(*f!=',') cerr<<*f++;cerr<<'='<<x<<",";_debug(f+1,y...);}
#ifdef LOCAL
#define gdb(...) _debug((char*)#__VA_ARGS__,__VA_ARGS__)
#else
#define gdb(...) void()
#endif
}using namespace Debug;
ll mpow(ll x,ll y=mod-2){ll ans=1;while(y) y&1&&(ans=ans*x%mod),y>>=1,x=x*x%mod;return ans;}
ll n,k;
int getid(ll x){
return x<=k?x:k+n/x;
}
namespace Mu{
ll f[N];
ll id[N];int ih;
void init(){
for(ll l=1,r;l<=n;l=r+1){
r=n/(n/l);
id[++ih]=n/l;
}
reverse(id+1,id+ih+1);
for(int i=1;i<=ih;i++){
int v=getid(id[i]);
f[v]=1;
for(ll l=2,r;l<=id[i];l=r+1){
r=id[i]/(id[i]/l);
f[v]-=f[getid(id[i]/l)]*(r-l+1);
}
}
}
}
namespace Pow{
const int B=(1<<15),N=B+5;
ll p1[N],p2[N];
void init(int x){
for(int i=p1[0]=1;i<=B;i++) p1[i]=p1[i-1]*x%mod;
for(int i=p2[0]=1;i<=B;i++) p2[i]=p2[i-1]*p1[B]%mod;
}
ll qry(ll x){
x=(x%Mod+Mod)%Mod;
return p1[x&(1<<15)-1]*p2[x>>15]%mod;
}
}
int vis[N];ll f[N],g[N],dp[N];
ll ask(ll x){
ll ans=-x;
ans+=Pow::qry(x/2)-1;
ans+=Pow::qry(x-1>>1)-1;
// for(ll i=2;i<=x;i++) ans+=mpow(2,i/2-1);
return ans%mod;
}
void calc(ll n){
int v=getid(n);
if(vis[v]) return;
vis[v]=1;
for(ll l=1,r;l<=n;l=r+1){
r=n/(n/l);
g[v]+=(Mu::f[getid(r)]-Mu::f[getid(l-1)])*(Pow::qry(n/l)-1)%mod;
}
// gdb(n);
g[v]=(g[v]%mod+mod)%mod;
for(ll l=2,r;l<=n;l=r+1){
r=n/(n/l);
calc(n/l);int u=getid(n/l);
ll w=ask(r)-ask(l-1);
f[v]+=w*(f[u]+f[u]-dp[u])*2%mod;
f[v]+=w*(g[u]*2-1)%mod;
f[v]+=(f[u]-dp[u])*(r-l+1)%mod;
f[v]+=(g[u]-mpow(2,n/l-1))*(r-l+1)%mod;
dp[v]+=(f[u]*3-dp[u])*(r-l+1)%mod;
dp[v]+=(Pow::qry(n/l-1)-1)*(r-l+1)%mod;
// if(n==5) gdb(f[n]);
}
f[v]=(f[v]%mod+mod)%mod;
dp[v]=(dp[v]%mod+mod)%mod;
// gdb(n,f[n],g[n],dp[n]);
}
void Solve(){
scanf("%lld",&n);
k=sqrt(n);
Mu::init();
Pow::init(2);
calc(n);
printf("%lld\n",(f[getid(n)]+mpow(2,n-1))%mod);
}
int main(){
int t=1;
// scanf("%d",&t);
while(t--) Solve();
cerr<<clock()*1.0/CLOCKS_PER_SEC<<'\n';
}
詳細信息
Subtask #1:
score: 4
Accepted
Test #1:
score: 4
Accepted
time: 2ms
memory: 8680kb
input:
6
output:
38
result:
ok 1 number(s): "38"
Test #2:
score: 4
Accepted
time: 1ms
memory: 6656kb
input:
7
output:
73
result:
ok 1 number(s): "73"
Test #3:
score: 4
Accepted
time: 0ms
memory: 6644kb
input:
8
output:
148
result:
ok 1 number(s): "148"
Test #4:
score: 4
Accepted
time: 1ms
memory: 8500kb
input:
9
output:
284
result:
ok 1 number(s): "284"
Test #5:
score: 4
Accepted
time: 1ms
memory: 6492kb
input:
10
output:
565
result:
ok 1 number(s): "565"
Subtask #2:
score: 13
Accepted
Dependency #1:
100%
Accepted
Test #6:
score: 13
Accepted
time: 0ms
memory: 8420kb
input:
30
output:
536938322
result:
ok 1 number(s): "536938322"
Test #7:
score: 13
Accepted
time: 1ms
memory: 6492kb
input:
35
output:
210046687
result:
ok 1 number(s): "210046687"
Test #8:
score: 13
Accepted
time: 0ms
memory: 6612kb
input:
38
output:
680532913
result:
ok 1 number(s): "680532913"
Test #9:
score: 13
Accepted
time: 1ms
memory: 8444kb
input:
39
output:
362030079
result:
ok 1 number(s): "362030079"
Test #10:
score: 13
Accepted
time: 1ms
memory: 6528kb
input:
40
output:
723529503
result:
ok 1 number(s): "723529503"
Subtask #3:
score: 17
Accepted
Dependency #2:
100%
Accepted
Test #11:
score: 17
Accepted
time: 2ms
memory: 8636kb
input:
2000
output:
686289840
result:
ok 1 number(s): "686289840"
Test #12:
score: 17
Accepted
time: 1ms
memory: 8096kb
input:
2500
output:
672176744
result:
ok 1 number(s): "672176744"
Test #13:
score: 17
Accepted
time: 0ms
memory: 6592kb
input:
2998
output:
77001108
result:
ok 1 number(s): "77001108"
Test #14:
score: 17
Accepted
time: 1ms
memory: 6396kb
input:
2999
output:
337824775
result:
ok 1 number(s): "337824775"
Test #15:
score: 17
Accepted
time: 1ms
memory: 6488kb
input:
3000
output:
636156660
result:
ok 1 number(s): "636156660"
Subtask #4:
score: 21
Accepted
Dependency #3:
100%
Accepted
Test #16:
score: 21
Accepted
time: 3ms
memory: 6512kb
input:
100000
output:
809175948
result:
ok 1 number(s): "809175948"
Test #17:
score: 21
Accepted
time: 5ms
memory: 6632kb
input:
200000
output:
425311829
result:
ok 1 number(s): "425311829"
Test #18:
score: 21
Accepted
time: 8ms
memory: 6636kb
input:
500000
output:
302623178
result:
ok 1 number(s): "302623178"
Test #19:
score: 21
Accepted
time: 12ms
memory: 6668kb
input:
900000
output:
683174559
result:
ok 1 number(s): "683174559"
Test #20:
score: 21
Accepted
time: 13ms
memory: 6676kb
input:
1000000
output:
126560600
result:
ok 1 number(s): "126560600"
Subtask #5:
score: 22
Accepted
Dependency #4:
100%
Accepted
Test #21:
score: 22
Accepted
time: 422ms
memory: 7352kb
input:
100000000
output:
269652149
result:
ok 1 number(s): "269652149"
Test #22:
score: 22
Accepted
time: 988ms
memory: 7816kb
input:
300000000
output:
421051808
result:
ok 1 number(s): "421051808"
Test #23:
score: 22
Accepted
time: 1894ms
memory: 8252kb
input:
700000000
output:
834273337
result:
ok 1 number(s): "834273337"
Test #24:
score: 22
Accepted
time: 2483ms
memory: 12424kb
input:
990000000
output:
848544380
result:
ok 1 number(s): "848544380"
Test #25:
score: 22
Accepted
time: 2503ms
memory: 12528kb
input:
1000000000
output:
341773916
result:
ok 1 number(s): "341773916"
Subtask #6:
score: 0
Time Limit Exceeded
Dependency #5:
100%
Accepted
Test #26:
score: 0
Time Limit Exceeded
input:
12000000000