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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
#746944#9619. 乘积,欧拉函数,求和MaxduanTL 1138ms7952kbC++142.9kb2024-11-14 15:55:472024-11-14 15:55:48

Judging History

你现在查看的是最新测评结果

  • [2024-11-14 15:55:48]
  • 评测
  • 测评结果:TL
  • 用时:1138ms
  • 内存:7952kb
  • [2024-11-14 15:55:47]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define maxn 3005
int a[maxn];
vector<int>prime;
int id[maxn];
int dp[1<<17][2],lst[1<<17][2];
vector<pii>vt[maxn];
const int p=998244353;
int func[maxn];

int qpow(int a,int b){
    int ans=1;
    int tmp=a;
    while(b){
        if(b&1){
            ans=ans*tmp%p;
        }
        tmp=tmp*tmp%p;
        b>>=1;
    }
    return ans;
}

void solve(){
    int n;cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    for(int i=2;i<=3000;i++){
        bool flag=1;
        for(int j=2;j*j<=i;j++){
            if(i%j==0){
                flag=0;
                break;
            }
        }
        if(flag){
            id[i]=prime.size();
            prime.push_back(i);
            func[i]=(i-1)*qpow(i,p-2)%p;
        }
    }

    int up=sqrt(3000);
    int ans=0;

    dp[0][0]=1;

    for(int i=1;i<=n;i++){
        int sit=0,flag=0;
        for(auto v:prime){
            if(a[i]%v!=0)continue;
            if(v>up){
                vt[v].emplace_back(sit,a[i]);
                flag=1;
                break;
            }
            else{
                sit|=(1<<id[v]);
            }
        }
        
        if(flag)continue;
        for(int j=0;j<(1<<17);j++){
            if(!dp[j][0])continue;
            int tmp=a[i];
            for(int k=0;k<17;k++){
                if((sit>>k&1)&&!(j>>k&1)){
                    tmp=tmp*func[prime[k]]%p;
                    
                }
            }
            lst[j|sit][0]+=dp[j][0]*tmp%p;
            if(lst[j|sit][0]>=p)lst[j|sit][0]-=p;
        }
        for(int j=0;j<(1<<17);j++){
            dp[j][0]+=lst[j][0];
            if(dp[j][0]>=p)dp[j][0]-=p;
            lst[j][0]=0;
        }
    }

    for(int i=1;i<=3000;i++){
        if(vt[i].empty())continue;
        for(auto [sit,x]:vt[i]){
            for(int j=0;j<(1<<17);j++){
                int tmp=x;
                for(int k=0;k<17;k++){
                    if((sit>>k&1)&&!(j>>k&1)){
                        tmp=tmp*func[prime[k]]%p;
                    }
                }
                (lst[j|sit][1]+=dp[j][0]*tmp%p*func[i]%p+dp[j][1]*tmp%p)%=p;
            }
            for(int j=0;j<(1<<17);j++){
                dp[j][0]+=lst[j][0];
                dp[j][1]+=lst[j][1];
                if(dp[j][0]>=p)dp[j][0]-=p;
                if(dp[j][1]>=p)dp[j][1]-=p;
                lst[j][0]=lst[j][1]=0;
            }
        }
        for(int j=0;j<(1<<17);j++){
            dp[j][0]+=dp[j][1];
            dp[j][1]=0;
            if(dp[j][0]>=p)dp[j][0]-=p;
        }
    }

    for(int i=0;i<(1<<17);i++){
        ans+=dp[i][0];
        if(ans>=p)ans-=p;
    }
    cout<<ans<<'\n';

}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int TT=1;//cin>>TT;
    while(TT--){
        solve();
    }
    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 3ms
memory: 7876kb

input:

5
1 6 8 6 2

output:

892

result:

ok single line: '892'

Test #2:

score: 0
Accepted
time: 4ms
memory: 7928kb

input:

5
3 8 3 7 8

output:

3157

result:

ok single line: '3157'

Test #3:

score: 0
Accepted
time: 1138ms
memory: 7904kb

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:

50965652

result:

ok single line: '50965652'

Test #4:

score: 0
Accepted
time: 1137ms
memory: 7952kb

input:

2000
1 1 1 1 1 1 1 1 353 1 1 1 557 1 1 1 1 1 1 1 1 1 1 1 1423 1 1 1327 1 1 1 907 1 1 1 1 1 2971 1 1 1 2531 1 1 1 1 1 1 1 1 1 2099 1 1 1 1 1 1 1 1 1 1 1 1 1 1 199 2999 1 727 1 1 1 1 1 1 1 71 1 1 1 1 1 1 2503 1 176 1 1 1 1 1 1 1361 1013 1 1 1 1 1 1 1 2699 1 1 1 1 1 1 1 1 1 2897 1 1 1 1 1637 1 1 1367 1...

output:

420709530

result:

ok single line: '420709530'

Test #5:

score: 0
Accepted
time: 6ms
memory: 7816kb

input:

30
37 14 35 33 38 42 46 3 26 7 16 1 35 38 48 3 43 49 18 3 29 1 43 43 20 6 39 20 14 38

output:

262613273

result:

ok single line: '262613273'

Test #6:

score: 0
Accepted
time: 10ms
memory: 7808kb

input:

30
39 31 49 2 4 28 30 12 13 34 7 28 17 37 38 18 41 33 29 36 18 7 3 14 30 42 35 14 18 35

output:

234142118

result:

ok single line: '234142118'

Test #7:

score: 0
Accepted
time: 155ms
memory: 7872kb

input:

200
53 37 234 248 66 30 64 181 38 130 250 27 199 226 43 185 207 241 38 296 68 18 145 20 64 127 57 30 168 267 221 116 115 192 17 26 5 63 3 127 52 48 229 58 69 111 20 244 234 35 48 217 179 189 89 60 285 106 43 104 36 28 62 281 104 38 281 264 140 275 105 20 203 271 222 262 123 10 82 263 118 254 229 222...

output:

617035263

result:

ok single line: '617035263'

Test #8:

score: 0
Accepted
time: 175ms
memory: 7920kb

input:

200
119 128 228 63 117 123 211 147 116 286 29 252 5 216 146 224 220 103 78 269 12 53 245 121 123 139 210 132 122 207 9 46 265 128 167 171 207 120 99 135 27 9 111 192 228 295 33 156 151 59 240 90 2 254 36 58 168 228 220 57 154 268 20 244 272 71 207 290 132 231 115 277 97 32 28 184 172 24 198 218 79 8...

output:

942938793

result:

ok single line: '942938793'

Test #9:

score: -100
Time Limit Exceeded

input:

2000
1516 1151 2408 2818 654 542 743 2216 777 1267 279 2373 605 367 2837 1608 2611 2315 883 2309 1185 832 1850 1696 1774 269 2448 2397 163 2223 715 1845 2805 467 519 585 323 517 1792 2206 2125 2984 1019 1777 193 972 1804 2408 2954 1155 1217 1959 1647 553 2716 2591 982 2776 1687 1504 2753 333 1803 23...

output:


result: