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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#823190#4283. Power of XORLuluWA 1216ms5164kbC++142.9kb2024-12-20 20:17:532024-12-20 20:17:54

Judging History

你现在查看的是最新测评结果

  • [2024-12-20 20:17:54]
  • 评测
  • 测评结果:WA
  • 用时:1216ms
  • 内存:5164kb
  • [2024-12-20 20:17:53]
  • 提交

answer

#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int N=44;
const ll mod=1e9+7;
#define lowbit(i) (i&(-i))
namespace L_B{
    ll f[N];
    void insert(ll x){
        for(int i=N-1;~i;i--){
            if(x&(1ll<<i)){
                if(f[i]){
                    x^=f[i];
                }else{
                    f[i]=x;
                    break;
                }
            }
        }
    }
    int getsize(){
        int res=0;
        for(int i=0;i<N;i++){
            if(f[i]){
                ++res;
            }
        }
        return res;
    }
    void rebuild(){
        for(int i=0;i<N;i++){
            if(!f[i]){
                continue;
            }
            for(int j=i-1;~j;j--){
                if((f[i]&(1ll<<j))&&f[j]){
                    f[i]^=f[j];
                }
            }
        }
    }
}
using namespace L_B;
int popcount(ll x){
    int res=0;
    while(x){
        x-=lowbit(x);
        ++res;
    }
    return res;
}
ll qpow(ll b,ll p){
    if(!p){
        return 1;
    }
    if(!b){
        return 0;
    }
    ll res=qpow(b,p/2);
    res=res*res%mod;
    if(p&1){
        res=res*b%mod;
    }
    return res;
}
int n,m;ll k;
ll a[N],g[N+1];
void init(){
    for(int i=0;i<=N;i++){
        g[i]=qpow(i,k);
    }
}
ll solve1(){
    int p=0;
    for(int i=0;i<N;i++){
        if(f[i]){
            a[p++]=f[i];
        }
    }
    ll res=0;
    for(int S=0;S<1<<p;S++){
        ll val=0;
        for(int i=0;i<p;i++){
            if(S&(1<<i)){
                val^=a[i];
            }
        }
        res+=g[popcount(val)];
        res%=mod;
    }
    return res;
}
ll dp[N][1<<20];
ll solve2(){
    for(int i=0;i<N;i++){
        if(!f[i]){
            continue;
        }
        int p=0;
        for(int j=0;j<N;j++){
            if(f[j]){
                continue;
            }
            if(f[i]&(1ll<<j)){
                a[i]^=1<<p;
            }
            ++p;
        }
    }
    int sum=0;
    dp[0][0]=1;
    for(int i=0;i<N;i++){
        if(!f[i]){
            continue;
        }
        for(int j=sum;~j;j--){
            for(int S=0;S<1<<(n-m);S++){
                dp[j+1][S^a[i]]+=dp[j][S];
                dp[j+1][S^a[i]]%=mod;
            }
        }
        ++sum;
    }
    ll res=0;
    for(int i=0;i<=m;i++){
        for(int S=0;S<1<<(n-m);S++){
            res+=dp[i][S]*g[i+popcount(S)];
            res%=mod;
        }
    }
    return res;
}
int main(){
    scanf("%d%lld",&n,&k);
    init();
    for(int i=1;i<=n;i++){
        ll x;
        scanf("%lld",&x);
        insert(x);
    }
    m=getsize();
    rebuild();
    ll res=0;
    if(m<=24){
        res=solve1();
    }else{
        res=solve2();
    }
    for(int i=m+1;i<=n;i++){
        res*=2;
        res%=mod;
    }
    printf("%lld\n",res);
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3864kb

input:

3 2
1 2 3

output:

12

result:

ok 1 number(s): "12"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3880kb

input:

2 1000000000
1 2

output:

140625003

result:

ok 1 number(s): "140625003"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3864kb

input:

3 4
21 31 15

output:

1076

result:

ok 1 number(s): "1076"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3760kb

input:

4 10
21 16 23 30

output:

3504120

result:

ok 1 number(s): "3504120"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3812kb

input:

5 795325759
23 18 18 15 24

output:

398580583

result:

ok 1 number(s): "398580583"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3796kb

input:

6 425010546
15190825693299 11021868218180 10853490476696 16489831131502 15731786397897 1859285400474

output:

226806798

result:

ok 1 number(s): "226806798"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3876kb

input:

7 376524109
14035202899482 10047025581205 744778190838 10085364176616 17517303536898 10648638998430 4344258259221

output:

909089159

result:

ok 1 number(s): "909089159"

Test #8:

score: 0
Accepted
time: 0ms
memory: 3812kb

input:

8 849112677
12651182249229 2557626671152 16190796268614 7679451552477 1419165382365 16010747922241 1877804892046 6782866140038

output:

60890703

result:

ok 1 number(s): "60890703"

Test #9:

score: 0
Accepted
time: 0ms
memory: 3812kb

input:

9 874735099
10148022499611 4300816040299 6425463859799 11220407430827 16167481816769 5361425691648 9036180330515 1461806017525 5752555300268

output:

371891946

result:

ok 1 number(s): "371891946"

Test #10:

score: 0
Accepted
time: 0ms
memory: 3948kb

input:

10 466547903
14475814446599 10414899512095 8279261110485 15402964537241 12059977291235 14960757658011 15642794803423 176456760404 8544855584093 939455648117

output:

705005476

result:

ok 1 number(s): "705005476"

Test #11:

score: 0
Accepted
time: 1ms
memory: 3796kb

input:

11 587282176
2381973819369 7896756717881 3605049079058 3476202500557 8161539414084 4107261754597 4052905214220 13489145138694 14249896320133 4915388559035 946556082447

output:

221771132

result:

ok 1 number(s): "221771132"

Test #12:

score: 0
Accepted
time: 1ms
memory: 3760kb

input:

12 416671000
12040275816251 17062751464343 7135252213488 464175530141 1680797265108 8088672081270 15974373338891 2807308701611 10474875618229 14385428199760 7217460885705 14772837072591

output:

888526388

result:

ok 1 number(s): "888526388"

Test #13:

score: 0
Accepted
time: 1ms
memory: 3808kb

input:

13 555186260
16812780767710 10577402574202 14435021461484 7629604678144 2685467464476 6345623360274 243420234591 10035113157523 3422776077242 10218637237089 14851966122299 403170012001 9905420122107

output:

990043010

result:

ok 1 number(s): "990043010"

Test #14:

score: 0
Accepted
time: 1ms
memory: 3888kb

input:

14 509328299
8353561750434 10104176798819 6443583453798 16526745760567 11644429218948 7613211796505 14675590153019 16014035780673 8977332980184 8018462423140 10321575146167 3765866187251 951943560884 16567591980900

output:

554786244

result:

ok 1 number(s): "554786244"

Test #15:

score: 0
Accepted
time: 3ms
memory: 3876kb

input:

15 608613602
13478763858236 3740903255952 1077573334827 10777446313857 9164622625061 3532139720401 10581691792868 227725402800 1100326438302 11314744041629 5716533742148 13171916589439 3380813371904 4280184438172 3241608634862

output:

451055479

result:

ok 1 number(s): "451055479"

Test #16:

score: 0
Accepted
time: 5ms
memory: 3884kb

input:

16 940201087
10256426323317 3262426443677 11042930351118 9509672586143 6874576733055 17425354233945 44840572217 271060611230 5160013582892 940549858628 3460145241956 1911512043119 6262508016313 15998335209279 4331486722244 1174379722227

output:

609521624

result:

ok 1 number(s): "609521624"

Test #17:

score: 0
Accepted
time: 10ms
memory: 3864kb

input:

17 224938820
17119676032384 14016470814638 9555327895162 4956367760197 14164877522334 11840938437493 196922732084 1117964651219 15662255500985 6799149377748 2081570899516 8101318468846 6806038800783 8481897921532 14327689591834 3468429675406 707483765694

output:

952629882

result:

ok 1 number(s): "952629882"

Test #18:

score: 0
Accepted
time: 18ms
memory: 3948kb

input:

18 572144592
1034330548675 7466761131151 5479486866730 5805192559012 2072047969997 14094135393106 3957442001455 9636000453501 6359658906102 13786563194342 12655202300227 17497546480004 15210614567784 5757118085432 3507806179905 4092815624732 2831474245754 8905127237409

output:

711094061

result:

ok 1 number(s): "711094061"

Test #19:

score: 0
Accepted
time: 37ms
memory: 3812kb

input:

19 655059034
10160251337230 17368680333349 7582672215712 15170782424265 11091464398448 3468569802147 12985801017272 11885768849226 2042891901510 5816113601266 17200614913667 3230577285683 6122037312518 4476865090037 17458280591698 8087876238641 12295868407218 14891985681505 9046310739642

output:

444845559

result:

ok 1 number(s): "444845559"

Test #20:

score: 0
Accepted
time: 73ms
memory: 3864kb

input:

20 230956009
5657766305333 6062575310370 15139059764699 15999531683504 8700249448570 8496370986569 11931362029342 16808274736949 6582914043608 3148217142903 623248093777 2603754608083 16741237934194 11551777078922 17177864498497 147568049427 2693939410255 11977553059228 14614351055705 11790115139758

output:

618103113

result:

ok 1 number(s): "618103113"

Test #21:

score: 0
Accepted
time: 147ms
memory: 3756kb

input:

21 991001581
13505588614813 8588095735948 6076766289787 11667017057163 7602334689492 3100571431902 16456031754497 17012042226760 2298783364823 2292586959243 16484353107729 6379611127333 2309984518512 17222120007066 15742378844056 10137340715213 11581793910964 6058313717190 9891627922923 939856806688...

output:

340865032

result:

ok 1 number(s): "340865032"

Test #22:

score: 0
Accepted
time: 297ms
memory: 3868kb

input:

22 793915239
14683316686425 5162188247000 7429819452817 16611661938749 11084135813793 13856133740403 13108004035448 13856666274966 9461726048738 5612503807810 15177562338647 5006352927897 15216557346760 8527880141821 15843683785466 7692179013817 127553824751 5234432790248 6453714209319 1152804933059...

output:

669154856

result:

ok 1 number(s): "669154856"

Test #23:

score: 0
Accepted
time: 601ms
memory: 3788kb

input:

23 46024280
7514210736994 16544433148860 5457306548546 5030077832970 10322997084235 5669909500374 8381456993928 10988407597025 8111544042162 10588037243918 12116378947678 13379626855924 10216405913667 9728737199159 12487637411090 11957321472850 15722206258699 17236861929685 15970454160165 2302405750...

output:

560027727

result:

ok 1 number(s): "560027727"

Test #24:

score: 0
Accepted
time: 1216ms
memory: 3752kb

input:

24 987331368
17225443429613 10254751679227 3710337795354 9960878278886 3536301339395 8181058117864 15108863858942 3302198449417 6902193486641 8347347537914 8639500195933 3284177408604 9417624777639 5862512932466 10643916118422 14918257011693 8684158391259 10231904191169 17423403571877 13578583210490...

output:

902893141

result:

ok 1 number(s): "902893141"

Test #25:

score: -100
Wrong Answer
time: 1ms
memory: 5164kb

input:

25 6356342
633691957112 12691686740693 2837615772764 12061807109950 14923133272874 14814883481961 15999555715426 13555874031521 6459210859425 556162071453 8417793517180 3701478570933 2799170553419 4135575419616 8116459391381 584184726086 12797443971069 16036119552969 1578981557574 7989957867379 1096...

output:

0

result:

wrong answer 1st numbers differ - expected: '314404834', found: '0'