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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
#354576#7778. Turning PermutationFlamire#WA 1ms3796kbC++171.5kb2024-03-15 17:19:532024-03-15 17:19:54

Judging History

你现在查看的是最新测评结果

  • [2024-03-15 17:19:54]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3796kb
  • [2024-03-15 17:19:53]
  • 提交

answer

#include <bits/stdc++.h>
#define ll long long
using namespace std;
int n,res[111];ll k,dp[111][111][2];
int main()
{
	scanf("%d%lld",&n,&k);
	dp[1][1][0]=dp[1][1][1]=1;//0: next dec 1:next inc
	for(int i=1;i<n;++i)
	{
		for(int j=1;j<=i;++j)
		{
			for(int k=1;k<=i+1;++k)
			{
				if(k<=j)
				{
					dp[i+1][k][1]=min((ll)2e18,dp[i][j][0]+dp[i+1][k][1]);
				}
				else
				{
					dp[i+1][k][0]=min((ll)2e18,dp[i][j][1]+dp[i+1][k][0]);
				}
			}
		}
	}
	ll ans=0;
	for(int i=1;i<=n;++i)ans=min((ll)2e18,ans+dp[n][i][0]+dp[n][i][1]);
	// for(int i=1;i<=n;++i)
	// {
	// 	for(int j=1;j<=i;++j)printf("{%lld,%lld} ",dp[i][j][0],dp[i][j][1]);putchar(10);
	// }
	if(ans<k)printf("-1\n");
	else
	{
		int o=-1;
		for(int i=1;i<=n;++i)
		{
			ll c=0;
			for(int j=1;j<=n-i+1;++j)
			{
				if(i==1)o=-1;else o=!(res[i-1]<=j);
				ll cur=min((ll)2e18,o==-1?(n-i+1!=1?dp[n-i+1][j][0]+dp[n-i+1][j][1]:1):dp[n-i+1][j][o]);
				ll nc=min((ll)2e18,c+cur);
				// printf("i:%d j:%d o:%d nc:%lld cur:%lld k:%lld\n",i,j,o,nc,cur,k);
				if(nc>=k)
				{
					res[i]=j;
					k-=c;
					break;
				}
				else c=nc;
			}
		}
		// for(int i=1;i<=n;++i)printf("%d ",res[i]);putchar(10);
		vector<int> tt;for(int i=1;i<=n;++i)tt.push_back(i);
		for(int i=1;i<=n;++i)
		{
			int x=res[i];
			res[i]=tt[x-1];
			tt.erase(tt.begin()+x-1);
		}
		for(int i=1;i<=n;++i)printf("%d ",res[i]);putchar(10);
		// putchar(10);/
	}
	fclose(stdin);fclose(stdout);return 0;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3796kb

input:

3 2

output:

2 1 3 

result:

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

Test #2:

score: 0
Accepted
time: 0ms
memory: 3728kb

input:

3 5

output:

-1

result:

ok 1 number(s): "-1"

Test #3:

score: -100
Wrong Answer
time: 0ms
memory: 3796kb

input:

4 6

output:

3 1 4 2 

result:

wrong answer 3rd numbers differ - expected: '2', found: '4'