Submission #1044503

#	Time	Username	Problem	Language	Result	Execution time	Memory
1044503		gagik_2007	Text editor (CEOI24_editor)	C++17	56 / 100	1016 ms	518816 KiB

Main

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

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define ff first
#define ss second

ll ttt;
const ll INF=1e18;
const ll MOD=1e9+7;
const ll N=5000007;
ll n,m,k;
ll si,sj,ei,ej;
ll len[N];
set<int>jjj;
vector<int>jj;
unordered_map<int,int>d;
vector<pair<int,ll>>g[N];

int vertexNumber(int i, int j){
    return j*n+i;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    // freopen("Cinput.txt","r",stdin);
    // freopen("Coutput.txt","w",stdout);
    cin>>n>>si>>sj>>ei>>ej;
    si--,sj--,ei--,ej--;
    jjj.insert(0);
    jjj.insert(sj);
    jjj.insert(ej);
    for(int i=0;i<n;i++){
        cin>>len[i];
        len[i]++;
        jjj.insert(len[i]-1);
    }
    int cnt=0;
    for(auto x:jjj){
        jj.push_back(x);
        d[x]=cnt;
        cnt++;
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<jj.size();j++){
            int v=vertexNumber(i,j);
            if(jj[j]>=len[i])break;

            // RIGHT
            if(j!=jj.size()-1&&jj[j+1]<len[i]){
                g[v].push_back({vertexNumber(i,j+1),jj[j+1]-jj[j]});
            }
            else if(i!=n-1){
                g[v].push_back({vertexNumber(i+1,0),1});
            }

            // LEFT
            if(j!=0){
                g[v].push_back({vertexNumber(i,j-1),jj[j]-jj[j-1]});
            }
            else if(i!=0){
                g[v].push_back({vertexNumber(i-1,d[len[i-1]-1]),1});
            }

            // UP
            if(i!=0&&jj[j]<len[i-1]){
                g[v].push_back({vertexNumber(i-1,j),1});
            }
            else if(i!=0){
                g[v].push_back({vertexNumber(i-1,d[len[i-1]-1]),1});
            }

            // DOWN
            if(i!=n-1&&jj[j]<len[i+1]){
                g[v].push_back({vertexNumber(i+1,j),1});
            }
            else if(i!=n-1){
                g[v].push_back({vertexNumber(i+1,d[len[i+1]-1]),1});
            }
        }
    }
    // for(auto x:jj){
    //     cout<<x<<" ";
    // }
    // cout<<endl;
    // for(int i=0;i<N;i++){
    //     if(!g[i].empty()){
    //         cout<<i<<":   ";
    //         for(auto e:g[i]){
    //             cout<<"{"<<e.ff<<", "<<e.ss<<"}, ";
    //         }
    //         cout<<endl;
    //     }
    // }
    priority_queue<pair<ll,int>>q;
    vector<ll>dist(N, INF);
    int start=vertexNumber(si,d[sj]);
    // cout<<start<<endl;
    q.push({0,start});
    dist[start]=0;
    // cout<<"OK"<<endl;
    while(!q.empty()){
        int v=q.top().ss;
        ll w=-q.top().ff;
        // cout<<v<<" "<<w<<endl;
        q.pop();
        if(dist[v]==w){
            for(auto e:g[v]){
                int to=e.ff;
                ll d=e.ss;
                if(dist[to]>dist[v]+d){
                    dist[to]=dist[v]+d;
                    // cout<<to<<" "<<dist[to]<<endl;
                    q.push({-dist[to],to});
                }
            }
        }
    }
    // cout<<vertexNumber(ei,d[ej])<<endl;
    cout<<dist[vertexNumber(ei,d[ej])]<<endl;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:51:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         for(int j=0;j<jj.size();j++){
      |                     ~^~~~~~~~~~
Main.cpp:56:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |             if(j!=jj.size()-1&&jj[j+1]<len[i]){
      |                ~^~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 14 / 14
• Subtask 3: 26 / 26
• Subtask 4: 11 / 11
• Subtask 5: 0 / 44