oj.uz

답안 #429229

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
429229 2021-06-15T19:13:39 Z amoo_safar Escape Route (JOI21_escape_route) C++17
70 / 100
 9000 ms 215296 KB 
#include "escape_route.h"

#include<bits/stdc++.h>

#define F first
#define S second
#define pb push_back
#define all(x) x.begin(), x.end()
#define debug(x) cerr <<  #x << " : " << x << '\n';

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<ll, ll> pll;

const int N = 92;
const ll Inf = 1e18;

int n, m;
ll S;

vi A, B;
vl L, C;
vector<int> G[N];

ll dj_dis[N], dj_mk[N];

void Djik(int src, ll st){
	memset(dj_dis, 31, sizeof dj_dis);
	memset(dj_mk, 0, sizeof dj_mk);
	dj_dis[src] = st;
	int adj;
	ll w;
	for(int _ = 0; _ < n; _++){
		int idx = -1;
		for(int i = 0; i < n; i++) if(!dj_mk[i]) idx = i;
		if(idx == -1) continue;
		for(int i = 0; i < n; i++) if(!dj_mk[i] && dj_dis[i] < dj_dis[idx]) idx = i;
		dj_mk[idx] = 1;
		for(auto e : G[idx]){
			adj = A[e] ^ B[e] ^ idx;
			if(dj_dis[idx] % S <= C[e] - L[e])
				w = dj_dis[idx] + L[e];
			else 
				w = dj_dis[idx] + (S - (dj_dis[idx] % S)) + L[e];
			if(w < dj_dis[adj])
				dj_dis[adj] = w;
		}
	}
}
ll dis0[N][N];

ll dis[N][N * N][N]; // u. no of (good) act. adj
ll tim[N][N * N], po[N];  //u. no of act.
int mk[N][N * N]; // u id_e

int Get(int u, ll st){
	int L = -1, R = po[u] + 1, mid;
	while(L + 1 < R){
		mid = (L + R) >> 1;
		if(tim[u][mid] >= st) L = mid;
		else R = mid;
	}
	assert(L != -1);
	return L;
}

pll Calc(int u){
	ll mn = S + 1;
	int idx = -1;
	for(int v = 0; v < n; v++){
		if(dis[u][ po[u] ][v] > S) continue;
		for(auto e : G[v]){
			if(mk[u][e]) continue;
			ll wt = dis[u][ po[u] ][v] - (C[e] - L[e]);
			wt = max(wt, 0ll);
			if(wt < mn){
				mn = wt;
				idx = e;
			}
		}
	}
	return pll(idx == -1 ? S + 1 : tim[u][po[u]] - mn, idx);
}

ll nw_dis[N];

set< pair<pll, int> > cand;

bool Step(){
	if(cand.empty()) return false;
	pair<pll, int> bst = *cand.rbegin(); //{pll(-1, -1), -1};
	cand.erase(bst);
	if(bst.F.S == -1) return true;
	// for(int i = 0; i < n; i++){
	// 	auto res = Calc(i);
	// 	if(res.S == -1) continue;
	// 	bst = max(bst, {Calc(i), i});
	// }
	// if(bst.S == -1) return false;

	int u = bst.S;
	int ed = bst.F.S;
	ll del = tim[u][po[u]] - bst.F.F;
	mk[u][ed] = 1;
	// if(u == 0){
	// 	cerr << "&& " << A[ed] << ' ' << B[ed] << '\n';
	// }
	if(tim[u][ po[u] ] < del){
		cand.insert({Calc(u), u});
		return true;
	}
	// cerr << "******* " << u << ' ' << tim[u][po[u]] - del << ' ' << bst.S << '\n';
	fill(nw_dis, nw_dis + N, S + 1);
	// old
	for(int i = 0; i < n; i++)
		if(dis[u][po[u]][i] != S + 1)
			nw_dis[i] = min(nw_dis[i], dis[u][ po[u] ][i] - del);

	int fr = A[ed], to = B[ed];
	if(nw_dis[fr] > nw_dis[to]) swap(fr, to);
	
	int lay = Get(to, C[ed]);
	// if(u == 0 && (ed == 0 || ed == 2)){
	// 	debug(to);
	// 	debug(dis[to][lay][to]);
	// 	debug(C[ed]);
	// 	debug(tim[to][lay]);
	// }
	for(int i = 0; i < n; i++)
		if(dis[to][lay][i] <= S)
			nw_dis[i] = min(nw_dis[i], dis[to][lay][i] - (tim[to][lay] - C[ed]));
	
	po[u] ++;
	tim[u][po[u]] = tim[u][po[u] - 1] - del;

	for(int i = 0; i < n; i++)
		dis[u][po[u]][i] = nw_dis[i];

	cand.insert({Calc(u), u});
	return true;
}

vl calculate_necessary_time(int _n, int _m, ll _S, int Q, vi _A, vi _B, vl _L, vl _C, vi _U, vi _V, vl _T) {
	n = _n; m = _m; S = _S;
	A = _A; B = _B; L = _L; C = _C;
	for(int i = 0; i < m; i++)
		G[A[i]].pb(i), G[B[i]].pb(i);

	for(int i = 0; i < N; i++)
		for(int j = 0; j < N; j++)
			fill(dis[i][j], dis[i][j] + n, S + 1);
	for(int i = 0; i < n; i++){
		po[i] = 0;
		tim[i][0] = S;
		dis[i][0][i] = S;
	}
	for(int i = 0; i < n; i++)
		cand.insert({Calc(i), i});
	while(Step()) ;
	for(int i = 0; i < n; i++){
		Djik(i, 0);
		for(int j = 0; j < n; j++)
			dis0[i][j] = dj_dis[j];
	}

	vl ANS;
	// for(int i = 0; i <= po[0]; i++){
	// 	cerr << "lay : " << tim[0][i] << '\n';
	// 	cerr << "! ";
	// 	for(int j = 0; j < n; j++)
	// 		cerr << dis[0][i][j] << ' ';
	// 	cerr << '\n';
	// }
	for(int i = 0; i < Q; i++){
		int lay = Get(_U[i], _T[i]);
		// if(i == 0){
		// 	debug(tim[_U[i]][lay]);
		// 	debug(dis[_U[i]][lay][_V[i]]);
		// 	// Djik(_U[i], _T[i]);
		// 	debug(tim[_U[i]][lay] - _T[i]);
		// }
		if(dis[_U[i]][lay][_V[i]] <= S)
			ANS.pb((dis[_U[i]][lay][_V[i]] - (tim[_U[i]][lay] - _T[i])) - _T[i]);
		else {
			ll res = Inf;
			for(int j = 0; j < n; j++){
				if(dis[_U[i]][lay][j] <= S){
					res = min(res, S - _T[i] + dis0[j][_V[i]]);
				}
			}
			ANS.pb(res);
		}
		// ANS.pb(dis[_V[i]] - _T[i]);
	}
	return ANS;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 43 ms 65012 KB Output is correct
2 Correct 58 ms 64988 KB Output is correct
3 Correct 231 ms 65028 KB Output is correct
4 Correct 37 ms 64928 KB Output is correct
5 Correct 162 ms 65100 KB Output is correct
6 Correct 40 ms 64948 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 765 ms 134224 KB Output is correct
2 Correct 666 ms 155724 KB Output is correct
3 Correct 805 ms 146120 KB Output is correct
4 Correct 1188 ms 155420 KB Output is correct
5 Correct 871 ms 155536 KB Output is correct
6 Correct 35 ms 64944 KB Output is correct
7 Correct 744 ms 144960 KB Output is correct
8 Correct 581 ms 147952 KB Output is correct
9 Correct 731 ms 133264 KB Output is correct
10 Correct 844 ms 155112 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 43 ms 65012 KB Output is correct
2 Correct 58 ms 64988 KB Output is correct
3 Correct 231 ms 65028 KB Output is correct
4 Correct 37 ms 64928 KB Output is correct
5 Correct 162 ms 65100 KB Output is correct
6 Correct 40 ms 64948 KB Output is correct
7 Correct 765 ms 134224 KB Output is correct
8 Correct 666 ms 155724 KB Output is correct
9 Correct 805 ms 146120 KB Output is correct
10 Correct 1188 ms 155420 KB Output is correct
11 Correct 871 ms 155536 KB Output is correct
12 Correct 35 ms 64944 KB Output is correct
13 Correct 744 ms 144960 KB Output is correct
14 Correct 581 ms 147952 KB Output is correct
15 Correct 731 ms 133264 KB Output is correct
16 Correct 844 ms 155112 KB Output is correct
17 Correct 977 ms 141828 KB Output is correct
18 Correct 917 ms 140844 KB Output is correct
19 Correct 787 ms 157272 KB Output is correct
20 Correct 1168 ms 146008 KB Output is correct
21 Correct 1236 ms 159100 KB Output is correct
22 Correct 1087 ms 159272 KB Output is correct
23 Correct 1184 ms 146376 KB Output is correct
24 Correct 703 ms 151720 KB Output is correct
25 Correct 936 ms 135180 KB Output is correct
26 Correct 1101 ms 161016 KB Output is correct

Subtask #4
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 43 ms 65012 KB Output is correct
2 Correct 58 ms 64988 KB Output is correct
3 Correct 231 ms 65028 KB Output is correct
4 Correct 37 ms 64928 KB Output is correct
5 Correct 162 ms 65100 KB Output is correct
6 Correct 40 ms 64948 KB Output is correct
7 Correct 765 ms 134224 KB Output is correct
8 Correct 666 ms 155724 KB Output is correct
9 Correct 805 ms 146120 KB Output is correct
10 Correct 1188 ms 155420 KB Output is correct
11 Correct 871 ms 155536 KB Output is correct
12 Correct 35 ms 64944 KB Output is correct
13 Correct 744 ms 144960 KB Output is correct
14 Correct 581 ms 147952 KB Output is correct
15 Correct 731 ms 133264 KB Output is correct
16 Correct 844 ms 155112 KB Output is correct
17 Correct 977 ms 141828 KB Output is correct
18 Correct 917 ms 140844 KB Output is correct
19 Correct 787 ms 157272 KB Output is correct
20 Correct 1168 ms 146008 KB Output is correct
21 Correct 1236 ms 159100 KB Output is correct
22 Correct 1087 ms 159272 KB Output is correct
23 Correct 1184 ms 146376 KB Output is correct
24 Correct 703 ms 151720 KB Output is correct
25 Correct 936 ms 135180 KB Output is correct
26 Correct 1101 ms 161016 KB Output is correct
27 Correct 2479 ms 195756 KB Output is correct
28 Correct 2466 ms 189396 KB Output is correct
29 Correct 2194 ms 206616 KB Output is correct
30 Correct 2840 ms 194868 KB Output is correct
31 Correct 2603 ms 208232 KB Output is correct
32 Correct 2885 ms 208224 KB Output is correct
33 Correct 804 ms 147596 KB Output is correct
34 Correct 2493 ms 182728 KB Output is correct
35 Correct 2791 ms 208760 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 43 ms 65012 KB Output is correct
2 Correct 58 ms 64988 KB Output is correct
3 Correct 231 ms 65028 KB Output is correct
4 Correct 37 ms 64928 KB Output is correct
5 Correct 162 ms 65100 KB Output is correct
6 Correct 40 ms 64948 KB Output is correct
7 Correct 765 ms 134224 KB Output is correct
8 Correct 666 ms 155724 KB Output is correct
9 Correct 805 ms 146120 KB Output is correct
10 Correct 1188 ms 155420 KB Output is correct
11 Correct 871 ms 155536 KB Output is correct
12 Correct 35 ms 64944 KB Output is correct
13 Correct 744 ms 144960 KB Output is correct
14 Correct 581 ms 147952 KB Output is correct
15 Correct 731 ms 133264 KB Output is correct
16 Correct 844 ms 155112 KB Output is correct
17 Correct 977 ms 141828 KB Output is correct
18 Correct 917 ms 140844 KB Output is correct
19 Correct 787 ms 157272 KB Output is correct
20 Correct 1168 ms 146008 KB Output is correct
21 Correct 1236 ms 159100 KB Output is correct
22 Correct 1087 ms 159272 KB Output is correct
23 Correct 1184 ms 146376 KB Output is correct
24 Correct 703 ms 151720 KB Output is correct
25 Correct 936 ms 135180 KB Output is correct
26 Correct 1101 ms 161016 KB Output is correct
27 Correct 2479 ms 195756 KB Output is correct
28 Correct 2466 ms 189396 KB Output is correct
29 Correct 2194 ms 206616 KB Output is correct
30 Correct 2840 ms 194868 KB Output is correct
31 Correct 2603 ms 208232 KB Output is correct
32 Correct 2885 ms 208224 KB Output is correct
33 Correct 804 ms 147596 KB Output is correct
34 Correct 2493 ms 182728 KB Output is correct
35 Correct 2791 ms 208760 KB Output is correct
36 Execution timed out 9064 ms 215296 KB Time limit exceeded
37 Halted 0 ms 0 KB -