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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#740818#9619. 乘积,欧拉函数,求和jdyt11TL 265ms4548kbC++201.3kb2024-11-13 11:40:522024-11-13 11:40:53

Judging History

你现在查看的是最新测评结果

  • [2024-11-13 11:40:53]
  • 评测
  • 测评结果:TL
  • 用时:265ms
  • 内存:4548kb
  • [2024-11-13 11:40:52]
  • 提交

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

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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...

output:


result: