QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#556676#8520. Xor PartitionsMu_Silk#WA 1ms8008kbC++20939b2024-09-10 20:08:052024-09-10 20:08:06

Judging History

你现在查看的是最新测评结果

  • [2024-09-10 20:08:06]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:8008kb
  • [2024-09-10 20:08:05]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const ll M=1e9+7;
const int N=300010;
ll dp[N],sumdp[N],sumdpi[N],fsum[N][64],a[N];

void solve(){
    int n;cin>>n;
    for(int i=1;i<=n;i++)cin>>a[i],a[i]^=a[i-1];
    dp[0]=1;
    sumdp[0]=1;

    for(int i=1;i<=n;i++){
        dp[i]=sumdp[i-1]*(a[i]%M)%M;
        dp[i]=(dp[i]+sumdpi[i-1])%M;
        for(int j=0;j<=60;j++){
            dp[i]=(dp[i]-((a[i]>>j&1)<<(j+1))%M*fsum[i-1][j]%M+M)%M;
        }

        sumdp[i]=(sumdp[i-1]+dp[i])%M;
        sumdpi[i]=(sumdpi[i-1]+dp[i]*(a[i])%M)%M;
        for(int j=0;j<=60;j++){
            fsum[i][j]=(fsum[i-1][j]+dp[i]*(a[i]>>j&1))%M;
        }
    }
    // for(int i=1;i<=n;i++)cout<<dp[i]<<" ";
    // cout<<"\n";
    cout<<dp[n]<<"\n";
}

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

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 7680kb

input:

4
7 3 1 2

output:

170

result:

ok 1 number(s): "170"

Test #2:

score: 0
Accepted
time: 1ms
memory: 7684kb

input:

1
0

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 1ms
memory: 7716kb

input:

1
1

output:

1

result:

ok 1 number(s): "1"

Test #4:

score: 0
Accepted
time: 1ms
memory: 7816kb

input:

3
1 2 3

output:

16

result:

ok 1 number(s): "16"

Test #5:

score: 0
Accepted
time: 1ms
memory: 7684kb

input:

4
0 1 0 1

output:

2

result:

ok 1 number(s): "2"

Test #6:

score: -100
Wrong Answer
time: 1ms
memory: 8008kb

input:

562
918479109239293921 960173570446350728 374394588863436385 418106819278123099 473761712658352147 662782574081105364 824954323015093862 827581845536521847 184394794881199801 820907621998888642 606529830885621237 961790689782125501 582742201855597942 337901250755571075 287706594894797714 18578215893...

output:

53555317

result:

wrong answer 1st numbers differ - expected: '641941658', found: '53555317'