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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #284265 | #7778. Turning Permutation | iorit# | WA | 0ms | 4012kb | C++14 | 2.3kb | 2023-12-16 13:06:53 | 2023-12-16 13:06:54 |
Judging History
answer
#include <bits/stdc++.h>
#define LL long long
#define sl(n) strlen(n)
#define endline puts("")
#define pii pair<int , int>
#define pr_q priority_queue
#define DEBUG puts("DEBUG.")
using namespace std;
const int N = 55 + 10;
const int inf = ~0u >> 2;
int n,p[N],q[N];
LL k,dp[N][N][2]; // dp x,y,0/1 表示剩了 x+y 个，比这一个数小、大的有 x,y 个，这一步向小 / 大走的
bool vis[N];
LL C[N][N];
LL calc(int x)
{
LL s = 1;
for(int i = 1;i <= n;i++)
q[i] = 0;
for(int i = 1;i <= x;i++)
q[ p[i] ] = i;
int cnt = n - x;
int lst = 0,dir = 0;
bool fl = 0;
q[0] = n + 1;
for(int i = 1;i <= n;i++)
{
if( q[i] )
{
if(i == lst + 1)
{
if(fl)
{
fl = 0;
dir = q[i] < q[lst] ? 0 : 1;
goto bre;
}
if(!lst)
goto bre;
if(q[i] < q[lst] && !dir || q[i] > q[lst] && dir)
return 0;
dir ^= 1;
}
else
{
if(dir)
return 0;
if(lst && i % 2 != lst % 2)
return 0;
if((__int128)s * C[cnt][i - lst - 1] > 1e18)
return 1000000000000000001;
s *= C[cnt][i - lst - 1];
if((__int128)s * dp[0][i - lst - 1][0] > 1e18)
return 1000000000000000001;
s *= dp[0][i - lst - 1][0];
cnt -= i - lst - 1;
}
bre:;
if(!lst)
fl = 1;
lst = i;
}
}
if(cnt && dir)
return 0;
if(cnt)
{
if((__int128)s * dp[0][cnt][0] > 1e18)
return 1000000000000000001;
s *= dp[0][cnt][0];
}
return s;
}
int main()
{
cin >> n >> k;
C[0][0] = 1;
for(int i = 1;i <= n;i++)
{
C[i][0] = 1;
for(int j = 1;j <= i;j++)
C[i][j] = C[i - 1][j] + C[i - 1][j - 1];
}
for(int i = 1;i <= n;i++)
dp[0][0][0] = dp[0][0][1] = 1;
for(int sum = 1;sum <= n;sum++)
{
for(int x = 0;x <= sum;x++)
{
int y = sum - x;
for(int xx = 0;xx <= x - 1;xx++)
dp[x][y][1] += dp[xx][sum - 1 - xx][0];
for(int yy = 0;yy <= y - 1;yy++)
dp[x][y][0] += dp[sum - 1 - yy][yy][1];
}
}
for(int i = 1;i <= n;i++)
{
bool fl = 0;
for(int j = 1;j <= n;j++)
{
if( vis[j] )
continue;
p[i] = j;
LL s = calc(i);
// cout << i << " " << s << endl;
if(k > s)
k -= s;
else
{
vis[j] = 1;
fl = 1;
break;
}
}
if(!fl)
return puts("-1"),0;
}
for(int i = 1;i <= n;i++)
printf("%d " , p[i] );
endline;
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3740kb
input:
3 2
output:
2 1 3
result:
ok 3 number(s): "2 1 3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3588kb
input:
3 5
output:
-1
result:
ok 1 number(s): "-1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3784kb
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: 3824kb
input:
4 11
output:
-1
result:
ok 1 number(s): "-1"
Test #5:
score: 0
Accepted
time: 0ms
memory: 4012kb
input:
3 1
output:
1 3 2
result:
ok 3 number(s): "1 3 2"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3820kb
input:
3 10
output:
-1
result:
ok 1 number(s): "-1"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
3 52
output:
-1
result:
ok 1 number(s): "-1"
Test #8:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
3 756
output:
-1
result:
ok 1 number(s): "-1"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3532kb
input:
3 7721
output:
-1
result:
ok 1 number(s): "-1"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3736kb
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: 3788kb
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: 3488kb
input:
5 85
output:
-1
result:
ok 1 number(s): "-1"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3608kb
input:
5 846
output:
-1
result:
ok 1 number(s): "-1"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3760kb
input:
5 6957
output:
-1
result:
ok 1 number(s): "-1"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3824kb
input:
8 1
output:
1 3 2 5 4 7 6 8
result:
ok 8 numbers
Test #16:
score: 0
Accepted
time: 0ms
memory: 3740kb
input:
8 7
output:
1 3 2 5 7 8 4 6
result:
ok 8 numbers
Test #17:
score: 0
Accepted
time: 0ms
memory: 3760kb
input:
8 71
output:
1 3 7 5 4 2 6 8
result:
ok 8 numbers
Test #18:
score: -100
Wrong Answer
time: 0ms
memory: 3500kb
input:
8 863
output:
-1
result:
wrong answer 1st numbers differ - expected: '3', found: '-1'