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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#633703 | #8520. Xor Partitions | Tasbeh | WA | 1ms | 5700kb | C++17 | 2.1kb | 2024-10-12 16:04:55 | 2024-10-12 16:04:56 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long int ini;
ini mod=1e9+7;
ini a[300005][70];
ini b[300005][70];
ini solve(ini base,ini pow)
{
if(pow==0) return 1;
ini x=solve(base,pow/2)%mod;
ini t=(((x%mod)*(x%mod))%mod*(base%mod))%mod;
ini r=((x%mod)*(x%mod))%mod;
if(pow%2) return t;
else return r;
}
ini _do(ini x,ini y,ini tr[])
{
bitset<70>g(x);
bitset<70>f(y);
ini sum=0;
for(ini i=0;i<=68;i++)
{
if(f[i]!=g[i]) sum=(sum%mod+tr[i]%mod)%mod;
}
return sum;
}
int main()
{
ini n;
cin>>n;
ini ar[n];
for(ini i=0;i<n;i++) cin>>ar[i];
ini tr[70]={0};
tr[0]=1;
for(ini i=1;i<=68;i++) tr[i]=((2%mod)*(tr[i-1]%mod))%mod;
if(n==1) cout<<ar[0]<<endl;
if(n==2)
{
ini x=((ar[0]%mod)*(ar[1]%mod))%mod;
ini y=_do(ar[0],ar[1],tr)%mod;
cout<<(x%mod+y%mod)%mod<<endl;
}
else{
ini br[n];
br[1]=ar[0];
br[0]=0;
ini kr[n];
kr[n-1]=ar[n-1];
for(ini i=n-2;i>=0;i--) kr[i]=_do(kr[i+1],ar[i],tr)%mod;
for(ini i=2;i<n;i++)
{
br[i]=_do(br[i-1],ar[i-1],tr)%mod;
}
bitset<70>bt(br[n-1]);
for(ini i=0;i<=65;i++)
{
if(bt[i]==0) b[n-1][i]=ar[n-1]%mod,a[n-1][i]=0;
else a[n-1][i]=ar[n-1]%mod,b[n-1][i]=0;
}
ini dum=0;
for(int i=n-2;i>=0;i--)
{
ini sum=0;
bitset<70>qt(br[i]);
for(int j=0;j<=65;j++)
{
if(qt[j])
{
ini f=tr[j];
sum=(sum%mod+((f%mod)*(b[i+1][j]%mod))%mod)%mod;
}
else{
ini f=tr[j];
sum=(sum%mod+((f%mod)*(a[i+1][j]%mod))%mod)%mod;
}
}
sum=(sum%mod+kr[i]%mod)%mod;
dum=sum;
for(ini j=0;j<=65;j++)
{
if(qt[j]==0) b[i][j]=(b[i+1][j]%mod+sum%mod)%mod,a[i][j]=a[i+1][j];
else a[i][j]=(a[i+1][j]%mod+sum%mod)%mod,b[i][j]=b[i+1][j];
}
}
cout<<dum<<endl;
}
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 5700kb
input:
4 7 3 1 2
output:
170
result:
ok 1 number(s): "170"
Test #2:
score: -100
Wrong Answer
time: 1ms
memory: 5676kb
input:
1 0
output:
0 0
result:
wrong answer Output contains longer sequence [length = 2], but answer contains 1 elements