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답안 #846561

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
846561 2023-09-07T21:53:52 Z midi 꿈 (IOI13_dreaming) C++14
18 / 100
 297 ms 32492 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define vc vector
typedef vc<ll> vcll;
#define pr pair
typedef pr<ll, ll> prll;

#define f0r(i,a,n) for (i=a; i<n; i++)
#define f1r(i,a,n) for (i=a; i<=n; i++)
#define r0f(i,n,a) for (i=n; i>a; i--)
#define r1f(i,n,a) for (i=n; i>=a; i--)

#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define in(s, x) ((s).find((x)) != (s).end())
#define all(x) (x).begin(), (x).end()
#define allrev(x) (x).rbegin(), (x).rend()

inline void maxa(ll &a, ll b) { if (a<b) a=b; }
inline void mina(ll &a, ll b) { if (a>b) a=b; }

#define INF (LLONG_MAX>>4ll)
#define mxN 100'010ll

ll n, m, l;
int *uar, *var, *war;
vc<vc<prll>> gr(mxN); // fi is w, se is v
vcll ar;

inline void build_gr()
{
	ll i;
	f0r(i,0,m)
	{
		ll u, v, w;
		u=uar[i];
		v=var[i];
		w=war[i];

		gr[u].pb({w, v});
		gr[v].pb({w, u});
	}
}

vc<bool> seen(mxN, 0);
map<prll, ll> from_to; // the "to" gives the value

inline void init_umap()
{
	ll u;
	f0r(u,0,n)
	{
		from_to[mp(-1,u)]=-1;
		for (prll edge : gr[u])
		{
			ll v = edge.se;
			from_to[mp(u,v)]=-1;
			from_to[mp(v,u)]=-1;
		}
	}
}

vcll comp; // comp for component

void dfs(ll u)
{
	if (seen[u]) return;
	// printf("real, u: %lli\n", u);
	seen[u]=1;
	comp.pb(u);
	for (prll edge : gr[u])
	{
		ll v=edge.se;
		dfs(v);
	}
}

ll calc_from_to(ll p, ll u)
{
	ll &t = from_to[mp(p,u)];
	// if (t!=-1) printf("p: %lli, u: %lli, t: %lli\n", p, u, t);
	if (t!=-1) return t;

	ll m=0; // max
	for (prll edge : gr[u])
	{
		ll v=edge.se;
		if (v==p) continue;
		ll w=edge.fi;

		maxa(m, calc_from_to(u,v)+w);
	}

	// printf("res: %lli\n", m);
	return t=m;
}

inline ll minmaxdist(ll u)
{
	comp.clear();
	dfs(u);
	// printf("comp.size: %lli\n", (ll)comp.size());

	ll m=INF; // min
	for (ll u : comp)
	{
		mina(m, calc_from_to(-1, u));
		// printf("min: %lli\n", m);
	}
	// printf("true\n");

	return m;
}

inline void build_ar()
{
	init_umap();
	ll u;
	f0r(u,0,n)
	{
		if (seen[u]) continue;
		ar.pb(minmaxdist(u));
		// printf("ar.back(): %lli\n", ar.back());
	}
}

inline ll value()
{
	ll z=ar.size();
	// printf("z: %lli\n", z);
	if (z==1) return ar[0];
	if (z==2) return ar[0]+ar[1]+l;

	return max(ar[0]+ar[1]+l, ar[1]+ar[2]+(2*l));
}

int travelTime(int N, int M, int L, int A[], int B[], int T[])
{
	n=N;
	m=M;
	l=L;
	uar=A;
	var=B;
	war=T;

	build_gr();
	build_ar();
	sort(allrev(ar));
	return value();
}

/*
int main()
{
	freopen("dreaming.in", "r", stdin);

	int N, M, L, *A, *B, *T;
	A=new int[mxN];
	B=new int[mxN];
	T=new int[mxN];
	cin >> N >> M >> L;
	ll i;
	f0r(i,0,M) cin >> A[i] >> B[i] >> T[i];

	int v = travelTime(N, M, L, A, B, T);

	printf("ans: %i\n", v);

	return 0;
}
*/

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 297 ms 32492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 2648 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 297 ms 32492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 80 ms 15316 KB Output is correct
2 Correct 82 ms 16004 KB Output is correct
3 Correct 87 ms 15908 KB Output is correct
4 Correct 81 ms 15848 KB Output is correct
5 Correct 85 ms 15716 KB Output is correct
6 Correct 86 ms 17060 KB Output is correct
7 Correct 85 ms 16336 KB Output is correct
8 Correct 77 ms 15564 KB Output is correct
9 Correct 92 ms 15584 KB Output is correct
10 Correct 82 ms 16336 KB Output is correct
11 Correct 2 ms 2648 KB Output is correct
12 Correct 22 ms 10200 KB Output is correct
13 Correct 23 ms 10260 KB Output is correct
14 Correct 22 ms 10204 KB Output is correct
15 Correct 22 ms 10204 KB Output is correct
16 Correct 22 ms 10204 KB Output is correct
17 Correct 25 ms 10116 KB Output is correct
18 Correct 26 ms 10368 KB Output is correct
19 Correct 22 ms 10196 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 2 ms 2908 KB Output is correct
23 Correct 25 ms 10200 KB Output is correct

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 2648 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 297 ms 32492 KB Output isn't correct
2 Halted 0 ms 0 KB -