QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#740818 | #9619. 乘积,欧拉函数,求和 | jdyt11 | TL | 265ms | 4548kb | C++20 | 1.3kb | 2024-11-13 11:40:52 | 2024-11-13 11:40:53 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
int mod=998244353;
int dp[1<<17];
int pri[20]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,1};
int qp(int x,int y){
int re=1;
while(y){
if(y&1)re=re*x%mod;
x=x*x%mod;
y>>=1;
}
return re;
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
int _=1;//cin>>_;
while(_--){
int n;
cin>>n;
map<int,vector<pair<int,int>>>mp;
for(int i=0;i<n;i++){
int x;
cin>>x;
int num=0,sum=1;
for(int j=0;j<16;j++){
while(x%pri[j]==0)num|=(1<<j),sum*=pri[j],x/=pri[j];
}
mp[x].push_back({num,sum});
}
dp[0]=1;
for(auto [x,vec]:mp){
pri[16]=x;
for(auto [num,sum]:vec){
if(x!=1)num|=(1<<16);
for(int i=(1<<17)-1;i>=0;i--){
if(i>>16&1)dp[i|num]=(dp[i|num]+dp[i]*sum%mod*x%mod)%mod;
else dp[i|num]=(dp[i|num]+dp[i]*sum%mod*max(x-1,1ll)%mod)%mod;
}
}
for(int i=(1<<16);i<(1<<17);i++){
dp[i-(1<<16)]=(dp[i-(1<<16)]+dp[i])%mod;
dp[i]=0;
}
}
int ans=0;
for(int i=0;i<(1<<17);i++){
for(int j=0;j<16;j++){
if(i>>j&1){
dp[i]=dp[i]*(pri[j]-1)%mod;
dp[i]=dp[i]*qp(pri[j],mod-2)%mod;
}
}
ans=(ans+dp[i])%mod;
}
cout<<ans<<'\n';
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 265ms
memory: 4540kb
input:
5 1 6 8 6 2
output:
892
result:
ok single line: '892'
Test #2:
score: 0
Accepted
time: 265ms
memory: 4548kb
input:
5 3 8 3 7 8
output:
3157
result:
ok single line: '3157'
Test #3:
score: -100
Time Limit Exceeded
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...