oj.uz

Submission #444761

# Submission time Handle Problem Language Result Execution time Memory
444761 2021-07-15T06:46:26 Z deuslovelt Olympic Bus (JOI20_ho_t4) C++17
21 / 100
 39 ms 3620 KB 
//================code===================//

//#define TLE

#ifdef TLE
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#endif

#include <bits/stdc++.h>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <ctime>
#include <random>
#include <chrono>
//#include <stdint.h>

#define ci(t) cin>>t
#define co(t) cout<<t
#define LL long long
#define ld long double
#define fa(i,a,b) for(LL i=(a);i<(LL)(b);++i)
#define fd(i,a,b) for(LL i=(a);i>(LL)(b);--i)
#define setp tuple<LL,LL,LL>
#define setl pair<LL,LL>

#define micro 0.000000001

using namespace std;

ld PI = acos(-1);

LL gcd(LL a, LL b)
{
	if (!(a && b)) return max(a, b);
	return a % b ? gcd(b, a % b) : b;
}

#ifdef OHSOLUTION
#define ce(t) cerr<<t
#define AT cerr << "\n=================ANS=================\n"
#define AE cerr << "\n=====================================\n"
#define DB(a) cerr << __LINE__ << ": " << #a << " = " << (a) << endl;
#define __builtin_popcount __popcnt
#define __builtin_popcountll __popcnt64
#define LLL LL
#else
#define AT
#define AE
#define ce(t)
#define LLL __int128
#endif

pair <int, int> vu[9] = { {0,1},{1,0},{0,-1} ,{-1,0},{-1,0},{-1,-1}, {0,-1} , {1,-1},{-1,-1} }; //RDLU EWSN
mt19937 rng((unsigned int)chrono::steady_clock::now().time_since_epoch().count());


template<typename T, typename U> void ckmax(T& a, U b) { a = a < b ? b : a; }
template<typename T, typename U> void ckmin(T& a, U b) { a = a > b ? b : a; }
struct gcmp { bool operator()(LL a, LL b) { return a < b; } bool operator()(setl& a, setl& b) { return a.second < b.second; } };
struct lcmp { bool operator()(LL a, LL b) { return a > b; } bool operator()(setl& a, setl& b) { return a.second > b.second; } };

const int max_v = 2e2 + 7;
const int max_k = 2e2 + 7;
const int bsz = (1ll << 22) + 7;
const int INF = 0x3f3f3f3f;
const LL LNF = 0x3f3f3f3f3f3f3f3f;
const LL mod = 1e9 + 7; //998244353;
template<typename T, typename U> void MOD(T& a, U b) { a += b; if (a > mod) a -= mod; };

LL dist[max_v][max_v];
vector<int> adj[max_v];

int main()
{
#ifdef OHSOLUTION
	freopen("input.txt", "r", stdin);
#endif
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n, m; ci(n >> m);

	struct edge
	{
		LL u, v, c, d;
	};

	memset(dist, 0x3f, sizeof(dist));
	vector<edge> ve(m);
	int cd = 0;
	fa(i, 0, n) dist[i][i] = 0;
	for (auto& x : ve) ci(x.u >> x.v >> x.c >> x.d), --x.u, --x.v,dist[x.u][x.v]= x.c,adj[x.u].push_back(cd++);
	fa(k, 0, n) fa(i, 0, n) fa(j, 0, n) ckmin(dist[i][j], dist[i][k] + dist[k][j]);
	

	auto dijk = [&](int s,int e,int id)
	{
		vector<LL> dist(n, LNF);
		priority_queue<setl, vector<setl>, lcmp> pq;
		dist[s] = 0;
		pq.push({ s,0 });

		while (pq.size())
		{
			auto [u, c] = pq.top(); pq.pop();

			if (dist[u] ^ c) continue;

			if (ve[id].v == u)
			{
				if (dist[ve[id].u] > dist[u] + ve[id].c)
				{
					dist[ve[id].u] = dist[u] + ve[id].c;
					pq.push({ ve[id].u,dist[ve[id].u] });
				}
			}

			for (auto& x : adj[u]) if(x != id)
			{
				if (dist[ve[x].v] > dist[u] + ve[x].c)
				{
					dist[ve[x].v] = dist[u] + ve[x].c;
					pq.push({ ve[x].v, dist[ve[x].v] });
				}

			}
		}

		return dist[e];
	};

	LL ans = dist[0][n - 1] + dist[n - 1][0];
	int c = 0;
	for (auto& x : ve)
	{
		LL l = min(dist[0][n - 1], dist[0][x.v] + dist[x.u][n - 1] + x.c);
		LL r = min(dist[n - 1][0], dist[n - 1][x.v] + dist[x.u][0] + x.c);
		
		if (l + r + x.d < ans)
		{
			LL rl = dijk(0,n-1,c);
			LL rr = dijk(n-1,0,c);

			ckmin(ans, rl + rr + x.d);
		}

		++c;
	}
	
	ans>=LNF ? co(-1): co(ans);

	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 716 KB Output is correct
2 Correct 11 ms 676 KB Output is correct
3 Correct 11 ms 716 KB Output is correct
4 Correct 12 ms 728 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 11 ms 660 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Incorrect 11 ms 720 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 3532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 724 KB Output is correct
2 Correct 15 ms 680 KB Output is correct
3 Correct 28 ms 2760 KB Output is correct
4 Correct 11 ms 588 KB Output is correct
5 Correct 33 ms 3484 KB Output is correct
6 Correct 1 ms 588 KB Output is correct
7 Correct 1 ms 584 KB Output is correct
8 Correct 37 ms 3404 KB Output is correct
9 Correct 39 ms 3512 KB Output is correct
10 Correct 36 ms 3456 KB Output is correct
11 Correct 33 ms 3500 KB Output is correct
12 Correct 33 ms 3480 KB Output is correct
13 Correct 1 ms 588 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 1 ms 588 KB Output is correct
16 Correct 1 ms 588 KB Output is correct
17 Correct 1 ms 588 KB Output is correct
18 Correct 1 ms 588 KB Output is correct
19 Correct 34 ms 3488 KB Output is correct
20 Correct 33 ms 3404 KB Output is correct
21 Correct 32 ms 3404 KB Output is correct
22 Correct 35 ms 3620 KB Output is correct

Subtask #4
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 716 KB Output is correct
2 Correct 11 ms 676 KB Output is correct
3 Correct 11 ms 716 KB Output is correct
4 Correct 12 ms 728 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 11 ms 660 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Incorrect 11 ms 720 KB Output isn't correct
11 Halted 0 ms 0 KB -