oj.uz

Submission #173303

# Submission time Handle Problem Language Result Execution time Memory
173303 2020-01-03T18:12:29 Z MvC Hard route (IZhO17_road) C++11
19 / 100
 18 ms 14968 KB 
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=5e2+50;
const int mod=1e9+7;
using namespace std;
int n,i,j,t,u,v,x,y,p,mx,mxl[nmax],lvl[nmax],pr[nmax],rs,cur,cnt,nr,c;
vector<int>a[nmax],lf;
vector<pair<int,int> >lv[nmax][nmax],d[nmax];
void bas(int x,int p,int l)
{
	pr[x]=p;
	lvl[x]=mxl[x]=l;
	for(int i=0;i<(int)a[x].size();i++)
	{
		int y=a[x][i];
		if(y==p)continue;
		bas(y,x,l+1);
		mxl[x]=max(mxl[x],mxl[y]);
		d[x].pb(mkp(mxl[y]-lvl[x],y));
	}
}
void dis(int x,int p,int l)
{
	mx=max(mx,l);
	for(int i=0;i<(int)a[x].size();i++)
	{
		int y=a[x][i];
		if(y==p)continue;
		dis(y,x,l+1);
	}
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n;
	for(i=1;i<n;i++)
	{
		cin>>x>>y;
		a[x].pb(y);
		a[y].pb(x);
	}
	bas(1,0,0);
	for(i=2;i<=n;i++)
	{
		mx=0;
		dis(pr[i],i,0);
		d[i].pb(mkp(mx+1,pr[i]));
		if((int)a[i].size()==1)lf.pb(i);
	}
	for(i=1;i<=n;i++)
	{
		sort(d[i].begin(),d[i].end());
		reverse(d[i].begin(),d[i].end());
	}
	for(i=0;i<(int)lf.size();i++)
	{
		x=lf[i],mx=0,nr=0,c=0;
		while(x)
		{
			lv[x][c].pb(mkp(nr,mx));
			cur=-1;
			for(j=0;j<(int)d[x].size();j++)
			{
				if(d[x][j].sc!=c && d[x][j].sc!=pr[x])
				{
					cur=d[x][j].fr;
					break;
				}
			}
			if(cur!=-1)mx=max(mx,cur);
			c=x,x=pr[x],nr++;
		}
	}
	for(i=1;i<=n;i++)
	{
		for(j=0;j<(int)a[i].size();j++)
		{
			x=a[i][j];
			if(x==pr[i])continue;
			for(t=j+1;t<(int)a[i].size();t++)
			{
				y=a[i][t];
				if(y==pr[i])continue;
				mx=0;
				for(p=0;p<(int)d[i].size();p++)
				{
					if(d[i][p].sc!=x && d[i][p].sc!=y)
					{
						mx=d[i][p].fr;
						break;
					}
				}
				for(u=0;u<(int)lv[i][x].size();u++)
				{
					for(v=0;v<(int)lv[i][y].size();v++)
					{
						cur=max(mx,max(lv[i][x][u].sc,lv[i][y][v].sc))*(lv[i][x][u].fr+lv[i][y][v].fr);
						if(rs==cur)cnt++;
						else if(rs<cur)rs=cur,cnt=1;
					}
				}
			}
		}
	}
	if((int)a[1].size()==1)
	{
		for(i=0;i<(int)a[1].size();i++)
		{
			x=a[1][i];
			for(j=0;j<(int)lv[1][x].size();j++)
			{
				cur=lv[1][x][j].fr*lv[1][x][j].sc;
				if(rs==cur)cnt++;
				else if(rs<cur)rs=cur,cnt=1;
			}
		}
	}
	cout<<rs<<" "<<cnt<<endl;
	return 0;
}

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 9 ms 7548 KB Output is correct
3 Correct 9 ms 7544 KB Output is correct
4 Correct 10 ms 7416 KB Output is correct
5 Correct 9 ms 7416 KB Output is correct
6 Correct 9 ms 7416 KB Output is correct
7 Correct 9 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 9 ms 7416 KB Output is correct
11 Correct 9 ms 7544 KB Output is correct
12 Correct 9 ms 7544 KB Output is correct
13 Correct 9 ms 7544 KB Output is correct
14 Correct 9 ms 7416 KB Output is correct
15 Correct 9 ms 7548 KB Output is correct
16 Correct 9 ms 7416 KB Output is correct
17 Correct 9 ms 7416 KB Output is correct
18 Correct 9 ms 7416 KB Output is correct
19 Correct 9 ms 7416 KB Output is correct
20 Correct 11 ms 7548 KB Output is correct
21 Correct 11 ms 7544 KB Output is correct
22 Correct 11 ms 7544 KB Output is correct
23 Correct 11 ms 7544 KB Output is correct
24 Correct 9 ms 7544 KB Output is correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 9 ms 7548 KB Output is correct
3 Correct 9 ms 7544 KB Output is correct
4 Correct 10 ms 7416 KB Output is correct
5 Correct 9 ms 7416 KB Output is correct
6 Correct 9 ms 7416 KB Output is correct
7 Correct 9 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 9 ms 7416 KB Output is correct
11 Correct 9 ms 7544 KB Output is correct
12 Correct 9 ms 7544 KB Output is correct
13 Correct 9 ms 7544 KB Output is correct
14 Correct 9 ms 7416 KB Output is correct
15 Correct 9 ms 7548 KB Output is correct
16 Correct 9 ms 7416 KB Output is correct
17 Correct 9 ms 7416 KB Output is correct
18 Correct 9 ms 7416 KB Output is correct
19 Correct 9 ms 7416 KB Output is correct
20 Correct 11 ms 7548 KB Output is correct
21 Correct 11 ms 7544 KB Output is correct
22 Correct 11 ms 7544 KB Output is correct
23 Correct 11 ms 7544 KB Output is correct
24 Correct 9 ms 7544 KB Output is correct
25 Runtime error 18 ms 14968 KB Execution killed with signal 11 (could be triggered by violating memory limits)
26 Halted 0 ms 0 KB -

Subtask #3
0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 9 ms 7548 KB Output is correct
3 Correct 9 ms 7544 KB Output is correct
4 Correct 10 ms 7416 KB Output is correct
5 Correct 9 ms 7416 KB Output is correct
6 Correct 9 ms 7416 KB Output is correct
7 Correct 9 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 9 ms 7416 KB Output is correct
11 Correct 9 ms 7544 KB Output is correct
12 Correct 9 ms 7544 KB Output is correct
13 Correct 9 ms 7544 KB Output is correct
14 Correct 9 ms 7416 KB Output is correct
15 Correct 9 ms 7548 KB Output is correct
16 Correct 9 ms 7416 KB Output is correct
17 Correct 9 ms 7416 KB Output is correct
18 Correct 9 ms 7416 KB Output is correct
19 Correct 9 ms 7416 KB Output is correct
20 Correct 11 ms 7548 KB Output is correct
21 Correct 11 ms 7544 KB Output is correct
22 Correct 11 ms 7544 KB Output is correct
23 Correct 11 ms 7544 KB Output is correct
24 Correct 9 ms 7544 KB Output is correct
25 Runtime error 18 ms 14968 KB Execution killed with signal 11 (could be triggered by violating memory limits)
26 Halted 0 ms 0 KB -