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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#764368 | #9619. 乘积,欧拉函数,求和 | Hanghang | WA | 311ms | 5372kb | C++20 | 1.3kb | 2024-11-20 08:51:22 | 2024-11-20 08:51:36 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll N=3003,M=(1<<16)+3,V=(1<<16)-1,H=998244353;
ll n,ans,cnt,a[N],b[N],pri[N],num[N],iv[M],sum[M],F[M],G[M];
bool vis[N];
vector<int>ve[N];
ll Val(ll x){return (x-1)*iv[x]%H;}
void Init()
{
for(int i=2;i<N;i++)
{
if(!vis[i])pri[++cnt]=i,num[i]=cnt;
for(int j=1;j<=cnt&&pri[j]*i<N;j++)
{
vis[pri[j]*i]=1;
if(i%pri[j]==0)break;
}
}
iv[0]=iv[1]=sum[0]=1;
for(int i=2;i<N;i++)iv[i]=H-H/i*iv[H%i]%H;
for(int i=1;i<=V;i++)sum[i]=sum[i-(i&-i)]*Val(pri[__lg(i&-i)+1])%H;
}
void Add(ll &x,ll y){x=(x+y)%H;}
void Sol(ll *f,const vector<int> &now)
{
for(int i=0;i<=V;i++)f[i]=i==0;
for(int id:now)
for(int i=V;i>=0;i--)Add(f[i|b[id]],f[i]*a[id]);
}
int main()
{
cin>>n;Init();
for(int i=1,x;i<=n;i++)
{
cin>>x,a[i]=x;
for(int j=1;j<=cnt&&pri[j]<=53;j++)if(x%pri[j]==0)
{
b[i]|=1<<(j-1);
while(x%pri[j]==0)x/=pri[j];
}
if(x>1)ve[x].push_back(i);
}
vector<int>cur(n,0);iota(cur.begin(),cur.end(),1);
Sol(F,cur);
for(int t=1;t<=cnt;t++)if(pri[t]>53&&ve[pri[t]].size())
{
Sol(G,ve[pri[t]]);
for(int i=1;i<=V;i++)F[i]=(F[i]-G[i]+H)%H;
for(int i=1;i<=V;i++)Add(ans,G[i]*sum[i]%H*Val(pri[t]));
}
for(int i=0;i<=V;i++)Add(ans,F[i]*sum[i]);
cout<<ans;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 4944kb
input:
5 1 6 8 6 2
output:
892
result:
ok single line: '892'
Test #2:
score: 0
Accepted
time: 2ms
memory: 4600kb
input:
5 3 8 3 7 8
output:
3157
result:
ok single line: '3157'
Test #3:
score: -100
Wrong Answer
time: 311ms
memory: 5372kb
input:
2000 79 1 1 1 1 1 1 2803 1 1 1 1 1 1 1609 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2137 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 613 1 499 1 211 1 2927 1 1 1327 1 1 1123 1 907 1 2543 1 1 1 311 2683 1 1 1 1 2963 1 1 1 641 761 1 1 1 1 1 1 1 1 1 1 1 1489 2857 1 1 1 1 1 1 1 1 1 1 1 1 1 967 1 821 1 1 1 1 2143 1861...
output:
138739640
result:
wrong answer 1st lines differ - expected: '50965652', found: '138739640'