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Submission #408608

# Submission time Handle Problem Language Result Execution time Memory
408608 2021-05-19T09:17:22 Z Jasiekstrz Archery (IOI09_archery) C++17
78 / 100
 2000 ms 2448 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
const int N=2e5;
int tab[2*N+10];
int stationary(int n)
{
	int ans=n+1,g=n;
	for(int i=1;i<=n;i++)
	{
		vector<int> st;
		int cnt=0;
		for(int j=i+1;j<=n;j++)
		{
			if(tab[2*j-1]==-1 && tab[2*j-2]==-1)
				st.push_back(j);
			else if(tab[2*j-1]==1 && tab[2*j-2]==1)
			{
				if(st.empty())
					cnt++;
				else
					st.pop_back();
			}
		}
		if(i!=1)
		{
			if(tab[1]==1)
			{
				if(st.empty())
					cnt++;
				else
					st.pop_back();
			}
			if(tab[2]==1)
			{
				if(st.empty())
					cnt++;
				else
					st.pop_back();
			}
		}
		for(int j=2;j<i;j++)
		{
			if(tab[2*j-1]==-1 && tab[2*j]==-1)
				st.push_back(j);
			else if(tab[2*j-1]==1 && tab[2*j]==1)
			{
				if(st.empty())
					cnt++;
				else
					st.pop_back();
			}
		}
		if(i==1)
			cnt++;
		if(tab[2*i-1]==1)
			cnt++;
		st.push_back(i);
		int w=st[st.size()-1-cnt];
		if(w<ans || (w==ans && i>g))
		{
			ans=w;
			g=i;
		}
	}
	return g;
}
int moving(int n,int r)
{
	int ans=n+1,g=n;
	int fl;
	bool one=false;
	for(int i=1;i<2*n;i++)
	{
		if(tab[i]==1)
			continue;
		fl=i;
		break;
	}
	for(int i=1;i<=n;i++)
	{
		vector<int> st;
		int cnt=0;
		one=true;
		if(tab[2*i-1]==-1)
		{
			if(fl==2*i-1)
			{
				one=false;
				if(i!=1)
					st.push_back(i);
			}
			if(i!=1)
				cnt++;
		}
		for(int j=i-1;j>1;j--)
		{
			if(tab[2*j-1]==1 && tab[2*j]==1)
				st.push_back(j);
			else if(tab[2*j-1]==-1 && tab[2*j]==-1)
			{
				if(st.empty())
					cnt++;
				else
					st.pop_back();
			}
			if(j==(fl+1)/2)
			{
				one=false;
				st.push_back(j);
			}
		}
		if(i!=1)
		{
			if((fl+1)/2==1)
				one=false;
			else if(tab[1]==-1 && tab[2]==-1)
			{
				if(st.empty())
					cnt++;
				else
					st.pop_back();
			}
			if(tab[1]==1 || tab[2]==1)
				st.push_back(1);
		}
		for(int j=n;j>i;j--)
		{
			if(tab[2*j-1]==1 && tab[2*j-2]==1)
				st.push_back(j);
			else if(tab[2*j-1]==-1 && tab[2*j-2]==-1)
			{
				if(st.empty())
					cnt++;
				else
					st.pop_back();
			}
		}
		st.push_back(i);
		int w=i;
		//cerr<<i<<" "<<w<<" "<<cnt<<"\n";
		//for(auto v:st)
		//	cerr<<v<<" ";
		//cerr<<"\n\n";
		if(one)
		{
			w=(fl+2)/2;
			if(cnt>((fl+2)/2-i+n)%n)
				w=st[st.size()-cnt];
		}
		else
			w=st[st.size()-1-cnt];
		w=((i-(r-(w-i))-1)%n+n)%n+1;
		//cerr<<i<<" "<<w<<" "<<cnt<<"\n";
		//for(auto v:st)
		//	cerr<<v<<" ";
		//cerr<<"\n\n";
		if(w<ans || (w==ans && i>g))
		{
			ans=w;
			g=i;
		}
	}
	return g;
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n,r,x;
	cin>>n>>r>>x;
	for(int i=1;i<2*n;i++)
	{
		cin>>tab[i];
		if(tab[i]>x)
			tab[i]=1;
		else
			tab[i]=-1;
	}
	if(x==1)
		cout<<n<<"\n";
	else if(2<=x && x<=n+1)
		cout<<moving(n,r)<<"\n";
	else
		cout<<stationary(n)<<"\n";
	return 0;
}

Compilation message

archery.cpp: In function 'int moving(int, int)':
archery.cpp:72:6: warning: 'fl' may be used uninitialized in this function [-Wmaybe-uninitialized]
   72 |  int fl;
      |      ^~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 29 ms 452 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 2 ms 204 KB Output is correct

Subtask #2
72.0 / 94.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 9 ms 332 KB Output is correct
4 Correct 1790 ms 460 KB Output is correct
5 Execution timed out 2076 ms 1740 KB Time limit exceeded
6 Correct 1 ms 204 KB Output is correct
7 Correct 4 ms 332 KB Output is correct
8 Correct 890 ms 540 KB Output is correct
9 Correct 1724 ms 648 KB Output is correct
10 Correct 6 ms 332 KB Output is correct
11 Execution timed out 2090 ms 588 KB Time limit exceeded
12 Correct 30 ms 340 KB Output is correct
13 Execution timed out 2077 ms 1724 KB Time limit exceeded
14 Correct 105 ms 364 KB Output is correct
15 Execution timed out 2085 ms 588 KB Time limit exceeded
16 Correct 1 ms 204 KB Output is correct
17 Correct 8 ms 336 KB Output is correct
18 Correct 17 ms 332 KB Output is correct
19 Correct 53 ms 332 KB Output is correct
20 Correct 92 ms 368 KB Output is correct
21 Correct 1659 ms 588 KB Output is correct
22 Execution timed out 2068 ms 568 KB Time limit exceeded
23 Execution timed out 2058 ms 2416 KB Time limit exceeded
24 Correct 1 ms 204 KB Output is correct
25 Correct 5 ms 204 KB Output is correct
26 Correct 112 ms 372 KB Output is correct
27 Execution timed out 2062 ms 460 KB Time limit exceeded
28 Execution timed out 2071 ms 2000 KB Time limit exceeded
29 Correct 9 ms 448 KB Output is correct
30 Correct 92 ms 368 KB Output is correct
31 Correct 1363 ms 500 KB Output is correct
32 Execution timed out 2088 ms 2288 KB Time limit exceeded
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 18 ms 352 KB Output is correct
36 Correct 24 ms 332 KB Output is correct
37 Correct 975 ms 460 KB Output is correct
38 Execution timed out 2082 ms 460 KB Time limit exceeded
39 Correct 1 ms 204 KB Output is correct
40 Correct 6 ms 332 KB Output is correct
41 Correct 17 ms 344 KB Output is correct
42 Correct 23 ms 344 KB Output is correct
43 Correct 91 ms 332 KB Output is correct
44 Correct 344 ms 404 KB Output is correct
45 Correct 1357 ms 568 KB Output is correct
46 Correct 1828 ms 484 KB Output is correct
47 Execution timed out 2087 ms 2448 KB Time limit exceeded