답안 #879440

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
879440 2023-11-27T12:28:47 Z willychan Escape Route (JOI21_escape_route) C++17
0 / 100
1485 ms 157376 KB
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include "escape_route.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define inf 5e16
const int Ba = 90;
ll dis[Ba][Ba];
vector<pair<int,int> > side[Ba];
bitset<Ba> reach[Ba];
pair<ll,ll> Tdis[Ba][Ba];
ll dis0[Ba][Ba];
ll disx[Ba][Ba][Ba];
ll disy[Ba][Ba][Ba];

struct uxy{
	int u;
	int x;
	int y;
	int ind;
	uxy(int _u,int _x,int _y,int _ind){
		u = _u;
		x = _x;
		y = _y;
		ind = _ind;
	}
};

std::vector<long long> calculate_necessary_time(
    int N, int M, long long S, int Q, std::vector<int> A, std::vector<int> B,
    std::vector<long long> L, std::vector<long long> C, std::vector<int> U,
    std::vector<int> V, std::vector<long long> T) {
	for(int i=0;i<N;i++) side[i].clear();
    for(int i=0; i<M; i++) {
        side[A[i]].push_back({B[i],i});
        side[B[i]].push_back({A[i],i});
    }
	for(int i=0;i<N;i++){
		for(int j=0;j<N;j++) dis[i][j]=inf;
	}
	vector<pair<ll,uxy> > addedge;
    for(int e=0; e<M; e++) {
        int x = A[e];
        int y = B[e];
		for(int i=0;i<N;i++) disx[x][y][i]=disy[x][y][i]=inf;
        disx[x][y][x]=0;
        disy[x][y][y]=0;
        bitset<Ba> reachx;
        bitset<Ba> reachy;
        ll T = C[e]-L[e];
        while(true) {
            pair<ll,int> cur = {inf,-1};
            for(int i=0; i<N; i++) if(!reachx[i]) cur = min(cur, {disx[x][y][i],i});
            if(cur.first>=inf) break;
            for(auto g : side[cur.second]) {
                if(C[g.second]+cur.first<T)	 continue;
                if(disx[x][y][g.first]>cur.first+L[g.second]) disx[x][y][g.first]=cur.first+L[g.second];
            }
            reachx[cur.second]=1;
        }
        while(true) {
            pair<ll,int> cur = {inf,-1};
            for(int i=0; i<N; i++) if(!reachy[i]) cur = min(cur, {disy[x][y][i],i});
            if(cur.first>=inf) break;
            for(auto g : side[cur.second]) {
                if(C[g.second]-cur.first-L[g.second]-L[e]<T) continue;
                if(disy[x][y][g.first]>cur.first+L[g.second]) disy[x][y][g.first] = cur.first+L[g.second];
            }
            reachy[cur.second]=1;
        }
        for(int i=0; i<N; i++) {
			addedge.push_back({T-disx[x][y][i],uxy(i,x,y,e)});
        }
		reachx.reset();
		reachy.reset();
		for(int i=0;i<N;i++) disx[y][x][i]=disy[y][x][i]=inf;
		disy[y][x][x]=0;
		disx[y][x][y]=0;
        while(true) {
            pair<ll,int> cur = {inf,-1};
            for(int i=0; i<N; i++) if(!reachx[i]) cur = min(cur, {disx[y][x][i],i});
            if(cur.first>=inf) break;
            for(auto g : side[cur.second]) {
                if(C[g.second]-cur.first-L[g.second]-L[e]<T)	 continue;
                if(disx[y][x][g.first]>cur.first+L[g.second]) disx[y][x][g.first]=cur.first+L[g.second];
            }
            reachx[cur.second]=1;
        }
        while(true) {
            pair<ll,int> cur = {inf,-1};
            for(int i=0; i<N; i++) if(!reachy[i]) cur = min(cur, {disy[y][x][i],i});
            if(cur.first>=inf) break;
            for(auto g : side[cur.second]) {
                if(C[g.second]+cur.first<T) continue;
                if(disy[y][x][g.first]>cur.first+L[g.second]) disy[y][x][g.first] = cur.first+L[g.second];
            }
            reachy[cur.second]=1;
        }
        for(int i=0; i<N; i++) {
			addedge.push_back({T-disx[y][x][i],uxy(i,y,x,e)});
        }
		
    }
	/*	
	for(int i=0;i<N;i++){
		for(int j=0;j<N;j++){
			cout<<i<<" "<<j<<":";
			for(int e=0;e<2*M;e++) cout<<"("<<dis[i][j][e].first<<" "<<dis[i][j][e].second<<") ";
			cout<<"\n";
		}
	}*/
	sort(addedge.begin(),addedge.end(),[](const pair<ll,uxy> &a,const pair<ll,uxy> &b){return a.first<b.first;});
    for(int s=0; s<N; s++) {
		reach[s].reset();
        for(int i=0; i<N; i++) dis0[s][i]=inf;
        dis0[s][s]=0;
        while(true) {
            pair<ll,int> cur = {inf,-1};
            for(int i=0; i<N; i++) if(!reach[s][i]) cur = min(cur, {dis0[s][i],i});
            if(cur.first>=inf)	break; 
            for(auto e : side[cur.second]) {
                int mind = e.second;
                if(C[mind]-L[mind]<cur.first) continue;
                if(dis0[s][e.first]>cur.first+L[mind]) {
                    dis0[s][e.first] = cur.first+L[mind];
                }
            }
            reach[s][cur.second]=1;
        }
    }
	{
	bitset<Ba> r;
	for(int s=0;s<N;s++){
		r.reset();
		for(int i=0;i<N;i++) Tdis[s][i] = {100,inf};
		Tdis[s][s]={0,0};
		while(true)	{
			pair<pair<ll,ll>,int>  cur = {{100,inf},-1};
			for(int i=0;i<N;i++){
				if(!r[i]){
					cur = min(cur,{Tdis[s][i],i});
				}
			}
			if(cur.first.first>=100 || cur.first.second>=inf) break;
			for(int i=0;i<N;i++){
				if(dis0[cur.second][i]<S){
					if(Tdis[s][i]>make_pair(cur.first.first+1,dis0[cur.second][i])){
						Tdis[s][i] = make_pair(cur.first.first+1,dis0[cur.second][i]); 
					}
				}
			}
			r[cur.second]=1;
		}
	}
	}


	vector<ll> ans(Q,inf);
	vector<int> ord(Q);
	for(int i=0;i<Q;i++) ord[i]=i;
	sort(ord.begin(),ord.end(),[&](const int &a,const int &b){return T[a]>T[b];});
	/*
	for(int i=0;i<N;i++){
		for(int j=0;j<N;j++){
			cout<<i<<" "<<j<<":"<<"("<<Tdis[i][j].first<<","<<Tdis[i][j].second<<")\n";
		}
	}*/
	int cnt = addedge.size();
	cnt--;
	for(int k=0;k<Q;k++){
		int i = ord[k];
		int u = U[i];
		ans[i] = min(ans[i],S-T[i]+((Tdis[u][V[i]].first-1)*S)+Tdis[u][V[i]].second);
		while(cnt>=0 && addedge[cnt].first>=T[i]){
			for(int i=0;i<N;i++){
				uxy cur = addedge[cnt].second;
				dis[cur.u][i] = min(dis[cur.u][i],disx[cur.x][cur.y][cur.u]+L[cur.ind]+disy[cur.x][cur.y][i]);
			}
			cnt--;
		}
		for(int v=0;v<N;v++){
			if(v==u) continue;
			if(dis[u][v]+T[i]<S && dis[u][v]>0){
//				cout<<i<<":"<<v<<"\n";
				if(v==V[i]){
					ans[i] = min(ans[i],dis[u][v]);	
				}else{
					ans[i] = min(ans[i],S-T[i]+((Tdis[v][V[i]].first-1)*S)+Tdis[v][V[i]].second);
				}
			}
			//if(N>60 && ct>N/2+N/3) break;
		}
	}
	return ans;
}
# 결과 실행 시간 메모리 Grader output
1 Incorrect 11 ms 65112 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 1485 ms 157376 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 11 ms 65112 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 11 ms 65112 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 11 ms 65112 KB Output isn't correct
2 Halted 0 ms 0 KB -