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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#694903 | #7778. Turning Permutation | 123456zmy# | WA | 0ms | 3932kb | C++17 | 2.2kb | 2024-10-31 18:54:43 | 2024-10-31 18:54:48 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
#define ll __int128
using namespace std;
int n,k;
vector<int>a;
int b[51];
ll cnt0[51],cnt1[51];
ll c[51][51];
ll C(int i,int j)
{
if(i<j||j<0)return 0;
if(i==j||j==0)return 1;
if(c[i][j])return c[i][j];
return c[i][j]=C(i-1,j-1)+C(i-1,j);
}
ll zmy(vector<int> v,int n)
{
if(v[0]&1)//cnt1
{
sort(v.begin(),v.end());
int lst=0;
vector<int>a;
for(int x:v)
{
if(x!=lst+1)
{
if(lst%2==0&&lst!=0)return 0;
if(x%2==0&&x!=n+1)return 0;
a.push_back(x-lst-1);
}
lst=x;
}
ll ans=cnt1[n-lst];
n-=v.size();
for(auto x:a)ans*=cnt1[x]*C(n,x),n-=x;
return ans;
}
else//cnt0
{
sort(v.begin(),v.end());
int lst=0;
vector<int>a;
for(int x:v)
{
if(x!=lst+1)
{
if(lst%2==1&&lst!=0)return 0;
if(x%2==1&&x!=n+1)return 0;
a.push_back(x-lst-1);
}
lst=x;
}
ll ans=cnt0[n-lst];
n-=v.size();
for(auto x:a)ans*=cnt0[x]*C(n,x),n-=x;
return ans;
}
}
signed main()
{
cnt1[0]=cnt0[0]=1;
cnt1[1]=cnt0[1]=1;
for(int i=2;i<=50;i++)
{
vector<int>v(1);
for(int j=1;j<=i;j++)
{
v[0]=j;
if(j&1)cnt1[i]+=zmy(v,i);
else cnt0[i]+=zmy(v,i);
// printf("%d ",zmy(v,i));
}//puts("");
}
// for(int i=0;i<=4;i++)printf("%d ",cnt0[i]);puts("");
// for(int i=0;i<=4;i++)printf("%d ",cnt1[i]);
scanf("%lld %lld",&n,&k);
if(k>cnt0[n]+cnt1[n])puts("-1"),exit(0);
for (int i=1;i<=n;i++)
{
for (int j=1;j<=n;j++)if (b[j]==0)
{
a.push_back(j);
ll p=zmy(a,n);
// printf("%d\n",zmy(a,n));
// for(auto x:a)printf("%d-",x);puts("");
if (p<k)k-=p;
else
{
b[j]=1;
break;
}
a.pop_back();
}
}
for (int i=0;i<n;i++)printf("%lld ",a[i]);
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3848kb
input:
3 2
output:
2 1 3
result:
ok 3 number(s): "2 1 3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3780kb
input:
3 5
output:
-1
result:
ok 1 number(s): "-1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3876kb
input:
4 6
output:
3 1 2 4
result:
ok 4 number(s): "3 1 2 4"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3932kb
input:
4 11
output:
-1
result:
ok 1 number(s): "-1"
Test #5:
score: -100
Wrong Answer
time: 0ms
memory: 3836kb
input:
3 1
output:
1 2 3
result:
wrong answer 2nd numbers differ - expected: '3', found: '2'