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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#65155#5117. Find Maximumdad11WA 15ms3356kbC++142.1kb2022-11-27 20:25:112022-11-27 20:25:13

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-11-27 20:25:13]
  • 评测
  • 测评结果:WA
  • 用时:15ms
  • 内存:3356kb
  • [2022-11-27 20:25:11]
  • 提交

answer

//题目:f[x]=  1  x=0
//		f[x/3]+1 xmod3=0
//		f[x-1]+1 xmod3!=0 
//给定一个区间,问该区间了f的最大值 
#include <cmath>
#include <cstring>
#include <algorithm>
#include <iostream>
#include <map>
#include<vector>
using namespace std;
typedef long long LL;
const int N=40;

int f(int x)
{
	if(x==2) return 3;
	if(x==1) return 2;
	if(x==0) return 1;
	if(x==3) return 3;
	if(x==4) return 4;
}

int main()
{
	int t;
	cin>>t;
	while(t--)
	{
		LL l,r;
		cin>>l>>r;
		if(r<=4)
		{
			cout<<f(r)<<endl;
			continue;
		} 
		vector<int> a,b;
		while(l)
		{
			a.push_back(l%3);
			l/=3;
		}
		while(r)
		{
			b.push_back(r%3);
			r/=3;
		}
		reverse(a.begin(),a.end());
		reverse(b.begin(),b.end());
		//for(int i=0;i<b.size();i++) cout<<b[i]<<" ";
		
		
		if(a.size()==b.size())
		{
			int ans1=0;
			for(int i=0;i<b.size();i++) ans1+=b[i];
			ans1+=b.size();
			int pos=0;
			for(int i=0;i<b.size();i++)
			{
				if(b[i]>a[i])
				{
					pos=i;
					break;
				}
			}
			for(int i=pos+1;i<b.size();i++) b[i]=2;
			b[pos]-=1;
			int ans=0;
			for(int i=0;i<b.size();i++) ans+=b[i];
			cout<<max(ans,ans1)<<endl;
		}
		else
		{
			int ans=0;
			int cnt=0;
			for(int i=0;i<b.size();i++) cnt+=b[i];
			if(cnt==2*b.size())
			{
				ans=3*b.size();
			}
			else if(b[0]==2||(cnt-b[0]==2*(b.size()-1)))
			{
				ans=2*(b.size()-1)+1+b.size();
			}
			else
			{
				cnt+=b.size();
				if(b[0]==1&&b[1]==0)
				{
					ans=2*(b.size()-1)+b.size()-1;
				}
				else if(b[0]==1&&b[1]==1)
				{
					bool flag=true;
					for(int i=2;i<b.size();i++)
					{
						if(b[i]!=2) 
						{
							flag=false;
							break;
						}
					}
					if(flag)
					{
						for(int i=0;i<b.size();i++) ans+=b[i];
					}
					else ans=3*(b.size()-1);
				}
				else if(b[0]==1&&b[1]==2)
				{
					int d=0;
					for(int i=2;i<b.size();i++)
					{
						d+=b[i];
					}
					if(2*(b.size()-2)-d>=2) ans=2*(b.size()-2)+2+b.size();
					else 
					{
						for(int i=0;i<b.size();i++) ans+=b[i];
					}
				}
				ans=max(ans,cnt);
			}
			cout<<ans<<endl;
		}
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 2ms
memory: 3272kb

input:

10
1 2
1 3
1 4
1 5
2 3
2 4
2 5
3 4
3 5
4 5

output:

3
3
4
5
3
4
5
4
5
5

result:

ok 10 numbers

Test #2:

score: -100
Wrong Answer
time: 15ms
memory: 3356kb

input:

5050
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
1 60
1 61...

output:

2
3
3
4
5
5
5
6
6
6
6
6
6
7
7
7
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
10
10
10
10
10
10
10
10
10
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
3
3
4
5
5
5
6
6
6
6
6
6
7
7
7
8
8
8
8
8
8
8...

result:

wrong answer 203rd numbers differ - expected: '5', found: '4'