제출 #203302

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
203302		wendy_virgo	경주 (Race) (IOI11_race)	C++14	0 / 100	8 ms	4984 KiB

race

#include <bits/stdc++.h>

using namespace std;

#define taskname "IOI11_race"
#define forinc(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define fordec(i, a, b) for (int i = (a), _b = (b); i >= _b; --i)
#define foreach(i, x) for (auto &i : x)
#define ms(x, n) memset(x, n, sizeof(x))
#define sz(x) int((x).size())
#define all(x) (x).begin(), (x).end()
#define uni(x) (x).erase(unique(all(x)), (x).end())
#define fi first
#define se second
#define pb push_back
#define pf push_front

template<typename TH>
void _dbg(const char* sdbg, TH h)
{
	cerr << sdbg << " = " << h << "\n";
}

template<typename TH, typename... TA>
void _dbg(const char* sdbg, TH h, TA... t)
{
	while (*sdbg != ',') cerr << *sdbg++;
	cerr << " = " << h << ",";
	_dbg(sdbg + 1, t...);
}

#define db(...) _dbg(#__VA_ARGS__, __VA_ARGS__)
#define chkpt cerr << "--- Checkpoint here ---\n";

const int N=2e5+5,INF=1e9;

int n,k,l[N];
vector<pair<int,int>> g[N];
int nEdge[1002][1002],root;
int64_t dist[1002][1002];

void DFS(int u,int fa,int d,int64_t sumW)
{
    nEdge[root][u]=d;
    dist[root][u]=sumW;
    foreach(p,g[u])
    {
        if(p.fi!=fa)
        {
            DFS(p.fi,u,d+1,sumW+l[p.se]);
        }
    }
}

void Calc(int u)
{
    root=u;
    DFS(u,-1,0,0);
}

int Sub2()
{
    forinc(i,0,n-1)
    {
        Calc(i);
    }
    int ans=INF;
    forinc(u,0,n-1)
    {
        forinc(v,u,n-1)
        {
            if(dist[u][v]==k)
            {
                ans=min(ans,nEdge[u][v]);
            }
        }
    }
    return (ans==INF?-1:ans);
}

int Solve()
{
    return Sub2();
}

int best_path(int N,int K,int H[][2],int L[])
{
    n=n;
    k=k;
    forinc(i,0,n-2)
    {
        g[H[i][0]].pb({H[i][1],i});
        g[H[i][1]].pb({H[i][0],i});
    }
    forinc(i,0,n-2)
    {
        l[i]=L[i];
    }
    return Solve();
}

//int main()
//{
//	ios_base::sync_with_stdio(0);
//	cin.tie(0);
//	#ifndef ONLINE_JUDGE
//	freopen(taskname".INP","r",stdin);
//	#endif // ONLINE_JUDGE
//	cin>>n>>k;
//	forinc(i,0,n-2)
//	{
//	    int u,v;
//	    cin>>u>>v;
//	    g[u].pb({v,i});
//	    g[v].pb({u,i});
//	}
//	forinc(i,0,n-2)
//	{
//	    cin>>l[i];
//	}
//	cout<<Solve();
//    return 0;
//}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 22
• Subtask 4: 0 / 57