Submission #1007686

#	Time	Username	Problem	Language	Result	Execution time	Memory
1007686		Unforgettablepl	Escape Route (JOI21_escape_route)	C++17	5 / 100	9072 ms	111964 KiB

escape_route

#include "escape_route.h"
#include <bits/stdc++.h>
using namespace std;

#define int long long

std::vector<long long> calculate_necessary_time(
    int32_t N, int32_t M, long long S, int32_t Q, std::vector<int32_t> A, std::vector<int32_t> B,
    std::vector<long long> L, std::vector<long long> C, std::vector<int32_t> U,
    std::vector<int32_t> V, std::vector<long long> T) {
    vector<vector<tuple<int,int,int>>> adj(N);
    for(int i=0;i<M;i++){
        adj[A[i]].emplace_back(B[i],L[i],C[i]);
        adj[B[i]].emplace_back(A[i],L[i],C[i]);
    }
    vector<vector<int>> distances(N,vector<int>(N));
    for(int i=0;i<N;i++){
        priority_queue<pair<int,int>> q;
        q.emplace(0,i);
        vector<int> visited(N,1e18);
        vector<bool> vis(N);
        visited[i] = 0;
        while(!q.empty()){
            auto [dist,idx] = q.top();q.pop();dist=-dist;
            if(vis[idx])continue;
            vis[idx]=true;
            for(auto[v,l,c]:adj[idx])if(!vis[v]){
                int nxttime = 0;
                int currtime = dist%S;
                if(currtime<=c-l)nxttime=dist+l;
                else {
                    nxttime = (dist/S)*S+l+S;
                }
                if(nxttime<visited[v]){
                    visited[v]=nxttime;
                    q.emplace(-nxttime,v);
                }
            }
        }
        distances[i]=visited;
    }
    vector<int> ans(Q);
    for(int i=0;i<Q;i++){
        priority_queue<pair<int,int>> q;
        q.emplace(-T[i],U[i]);
        vector<int> visited(N,1e18);
        vector<bool> vis(N);
        visited[U[i]] = T[i];
        while(!q.empty()){
            auto [dist,idx] = q.top();q.pop();dist=-dist;
            if(vis[idx])continue;
            vis[idx]=true;
            if(idx==V[i]){
                ans[i] = dist-T[i];
                break;
            }
            for(auto[v,l,c]:adj[idx])if(dist+l<visited[v] and dist<=c-l){
                visited[v]=dist+l;
                q.emplace(-dist-l,v);
            }
        }
        if(ans[i])continue;
        ans[i]=1e18;
        for(int x=0;x<N;x++)if(vis[x])ans[i]=min(ans[i],(visited[x]/S)*S+S+distances[x][V[i]]);
        ans[i]-=T[i];
    }
    return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 20
• Subtask 3: 0 / 10
• Subtask 4: 0 / 35
• Subtask 5: 0 / 30