QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#695100#7778. Turning Permutation123456zmyWA 1ms3932kbC++173.3kb2024-10-31 19:19:572024-10-31 19:19:58

Judging History

你现在查看的是最新测评结果

  • [2024-10-31 19:19:58]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3932kb
  • [2024-10-31 19:19:57]
  • 提交

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=min((__int128)2e18,ans*min((__int128)2e18,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=min((__int128)2e18,ans*min((__int128)2e18,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("");
        cnt1[i]=min((__int128)2e18,cnt1[i]);
        cnt0[i]=min((__int128)2e18,cnt0[i]);
    }
    // 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)
        {
            if(i!=1)
            {
                if(a[0]&1)
                {
                    if(j&1)
                    {
                        if((j>1&&b[j-1]==1)||(j<n&&b[j+1]==1))continue;
                    }
                    else
                    {
                        if((j>1&&b[j-1]==0)||(j<n&&b[j+1]==0))continue;
                    }
                }
                else
                {
                    if(j&1)
                    {
                        if((j>1&&b[j-1]==0)||(j<n&&b[j+1]==0))continue;
                    }
                    else
                    {
                        if((j>1&&b[j-1]==1)||(j<n&&b[j+1]==1))continue;
                    }
                }
            }
            
            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

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 3896kb

input:

3 2

output:

2 1 3 

result:

ok 3 number(s): "2 1 3"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3784kb

input:

3 5

output:

-1

result:

ok 1 number(s): "-1"

Test #3:

score: -100
Wrong Answer
time: 0ms
memory: 3932kb

input:

4 6

output:

-1

result:

wrong answer 1st numbers differ - expected: '3', found: '-1'