QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#602199 | #9309. Graph | laurxh | AC ✓ | 315ms | 48184kb | C++14 | 1.5kb | 2024-09-30 20:54:58 | 2024-09-30 20:55:06 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=5e6+7;
const int mod=998244353;
ll n,tot,cnt,len;
int vis[N],prime[N];
ll g[N],w[N],idx1[N],idx2[N];
void seive(){
for(int i=2;i<N;i++){
if(!vis[i])prime[++tot]=i;
for(int j=1;j<=tot&&1ll*i*prime[j]<N;j++){
vis[i*prime[j]]=1;
if(i%prime[j]==0)break;
}
}
}
ll kuasum(ll a,ll b){
ll ans=1;
while(b){
if(b&1)ans=ans*a%mod;
b>>=1;
a=a*a%mod;
}
return ans;
}
ll get_id(ll x){
return (x<=len?idx1[x]:idx2[n/x]);
}
ll get(ll x){
return g[get_id(x)];
}
signed main(){
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
seive();
cin>>n;
len=sqrt(n);
for(ll l=1,r;l<=n;l=r+1){
r=n/(n/l);ll x=n/l;w[++cnt]=x;
g[cnt]=x-1;
if(w[cnt]<=len)idx1[w[cnt]]=cnt;
else idx2[n/w[cnt]]=cnt;
}
for(int i=1;i<=tot;i++){
for(int j=1;j<=cnt&&1ll*prime[i]*prime[i]<=w[j];j++){
ll x=prime[i],r=w[j]/x;
int k=get_id(r);
g[j]-=g[k]-(i-1);
}
}
ll ans=1;
for(ll l=1,r;l<=n;l=r+1){
ll x=n/l;
r=n/x;
if(x==1)continue;
ll sum=get(x)-get(x/2)+1;
ll num=sum+(x!=sum);
ll res=kuasum(x%mod,num-2);
if(x!=sum)res=res*((x-sum)%mod)%mod;
// cout<<sum<<" "<<res<<"\n";
ans=ans*kuasum(res,r-l+1)%mod;
}
cout<<ans<<"\n";
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 15ms
memory: 33360kb
input:
4
output:
8
result:
ok answer is '8'
Test #2:
score: 0
Accepted
time: 19ms
memory: 33548kb
input:
2
output:
1
result:
ok answer is '1'
Test #3:
score: 0
Accepted
time: 21ms
memory: 33360kb
input:
123
output:
671840470
result:
ok answer is '671840470'
Test #4:
score: 0
Accepted
time: 18ms
memory: 33452kb
input:
233
output:
353738465
result:
ok answer is '353738465'
Test #5:
score: 0
Accepted
time: 19ms
memory: 33400kb
input:
5981
output:
970246821
result:
ok answer is '970246821'
Test #6:
score: 0
Accepted
time: 22ms
memory: 33380kb
input:
86422
output:
897815688
result:
ok answer is '897815688'
Test #7:
score: 0
Accepted
time: 18ms
memory: 31380kb
input:
145444
output:
189843901
result:
ok answer is '189843901'
Test #8:
score: 0
Accepted
time: 21ms
memory: 31392kb
input:
901000
output:
819449452
result:
ok answer is '819449452'
Test #9:
score: 0
Accepted
time: 18ms
memory: 33412kb
input:
1000000
output:
113573943
result:
ok answer is '113573943'
Test #10:
score: 0
Accepted
time: 22ms
memory: 33396kb
input:
23333333
output:
949849384
result:
ok answer is '949849384'
Test #11:
score: 0
Accepted
time: 18ms
memory: 31328kb
input:
102850434
output:
604886751
result:
ok answer is '604886751'
Test #12:
score: 0
Accepted
time: 33ms
memory: 33668kb
input:
998244353
output:
0
result:
ok answer is '0'
Test #13:
score: 0
Accepted
time: 30ms
memory: 35612kb
input:
1000000007
output:
318420284
result:
ok answer is '318420284'
Test #14:
score: 0
Accepted
time: 43ms
memory: 35836kb
input:
2147483547
output:
688759898
result:
ok answer is '688759898'
Test #15:
score: 0
Accepted
time: 61ms
memory: 38076kb
input:
5120103302
output:
116870489
result:
ok answer is '116870489'
Test #16:
score: 0
Accepted
time: 119ms
memory: 38556kb
input:
19834593299
output:
523663743
result:
ok answer is '523663743'
Test #17:
score: 0
Accepted
time: 209ms
memory: 41976kb
input:
52500109238
output:
195086665
result:
ok answer is '195086665'
Test #18:
score: 0
Accepted
time: 277ms
memory: 47408kb
input:
84848352911
output:
107959260
result:
ok answer is '107959260'
Test #19:
score: 0
Accepted
time: 303ms
memory: 48184kb
input:
99824435322
output:
0
result:
ok answer is '0'
Test #20:
score: 0
Accepted
time: 315ms
memory: 47080kb
input:
99999999354
output:
316301711
result:
ok answer is '316301711'
Test #21:
score: 0
Accepted
time: 315ms
memory: 45832kb
input:
100000000000
output:
396843576
result:
ok answer is '396843576'
Extra Test:
score: 0
Extra Test Passed