QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#771327 | #7778. Turning Permutation | jiangzhihui | WA | 0ms | 5712kb | C++14 | 2.1kb | 2024-11-22 11:45:21 | 2024-11-22 11:45:22 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=55;
ll dp[N][N][N][2],k;
int n;
ll g[N][N];
vector<int> val;
map<int,bool> vis;
bool cmp(int x,int y){
if(y==x+1&&vis[x-1])return false;
if(x==y+1&&vis[y-1])return true;
if(y==x-1&&vis[x+1])return false;
if(y==x+1&&vis[y+1])return true;
return x<y;
}
vector<int> getans(int len){
if(len==1){
return vector<int>(1,val[0]);
}
for(int i=1;i<=len;i++){
if(g[len][i]>=k){
vector<int> t;
t.push_back(val[i-1]);
vis[val[i-1]]=true;
val.erase(val.begin()+i-1);
sort(val.begin(),val.end(),cmp);
vector<int> tmp=getans(len-1);
for(auto v:tmp){
t.push_back(v);
}
return t;
}else{
k-=g[len][i];
}
}
return vector<int>();
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin>>n>>k;
dp[2][1][1][1]=1;
dp[2][2][2][0]=1;
for(int i=2;i<n;i++){
for(int j=1;j<=i;j++){
for(int k=1;k<=i;k++){
if(j==1&&k!=1)continue;
//1 before 2
for(int p=1;p<=k;p++){
if(p==1){
dp[i+1][1][1][1]+=dp[i][j][k][0];
}else{
dp[i+1][j+1][p][1]+=dp[i][j][k][0];
}
}
//1 after 2
for(int p=k;p<=i;p++){
dp[i+1][j+1][p+1][0]+=dp[i][j][k][1];
}
}
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=i;j++){
for(int k=1;k<=i;k++){
g[i][j]+=dp[i][j][k][0]+dp[i][j][k][1];
}
}
}
ll s=0;
for(int i=1;i<=n;i++){
val.push_back(i);
s+=g[n][i];
}
if(s<k){
cout<<-1<<endl;
return 0;
}
vector<int> ans=getans(n);
for(auto v:ans){
cout<<v<<" ";
}
cout<<endl;
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3524kb
input:
3 2
output:
2 1 3
result:
ok 3 number(s): "2 1 3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3804kb
input:
3 5
output:
-1
result:
ok 1 number(s): "-1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3644kb
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: 5688kb
input:
4 11
output:
-1
result:
ok 1 number(s): "-1"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3640kb
input:
3 1
output:
1 3 2
result:
ok 3 number(s): "1 3 2"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3796kb
input:
3 10
output:
-1
result:
ok 1 number(s): "-1"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
3 52
output:
-1
result:
ok 1 number(s): "-1"
Test #8:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
3 756
output:
-1
result:
ok 1 number(s): "-1"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3836kb
input:
3 7721
output:
-1
result:
ok 1 number(s): "-1"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3904kb
input:
5 1
output:
1 3 2 5 4
result:
ok 5 number(s): "1 3 2 5 4"
Test #11:
score: 0
Accepted
time: 0ms
memory: 3892kb
input:
5 8
output:
2 4 1 3 5
result:
ok 5 number(s): "2 4 1 3 5"
Test #12:
score: 0
Accepted
time: 0ms
memory: 3592kb
input:
5 85
output:
-1
result:
ok 1 number(s): "-1"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3852kb
input:
5 846
output:
-1
result:
ok 1 number(s): "-1"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3592kb
input:
5 6957
output:
-1
result:
ok 1 number(s): "-1"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3928kb
input:
8 1
output:
1 3 2 5 4 7 6 8
result:
ok 8 numbers
Test #16:
score: -100
Wrong Answer
time: 0ms
memory: 5712kb
input:
8 7
output:
1 3 2 4 6 8 5 7
result:
wrong answer 4th numbers differ - expected: '5', found: '4'