Submission #199569

#	Time	Username	Problem	Language	Result	Execution time	Memory
199569		handlename	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	22 / 100	1099 ms	79524 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
int n,m,s,e;
vector<pair<int,int> > adj[30001];
vector<int> pos[30001];
int dist[30001];
bool vis[30001];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin>>n>>m;
    for (int i=0;i<m;i++){
        int b,p;
        cin>>b>>p;
        if (i==0) s=b;
        if (i==1) e=b;
        pos[p].pb(b);
    }
    for (int i=1;i<30001;i++){
        memset(vis,false,sizeof(vis));
        for (auto j:pos[i]){
            vis[j]=true;
        }
        sort(pos[i].begin(),pos[i].end());
        for (int j=0;j<pos[i].size();j++){
            int dis=1;
            for (int k=pos[i][j]+i;k<n;k+=i){
                adj[pos[i][j]].pb(mp(k,dis));
                dis++;
                if (vis[k]) break;
            }
            dis=1;
            for (int k=pos[i][j]-i;k>=0;k-=i){
                adj[pos[i][j]].pb(mp(k,dis));
                dis++;
                if (vis[k]) break;
            }
        }
    }
    memset(dist,-1,sizeof(dist));
    priority_queue<pair<int,int>,vector<pair<int,int> >,greater<pair<int,int> > >pq;
    pq.push(mp(0,s));
    while (!pq.empty()){
        pair<int,int> cur=pq.top();
        pq.pop();
        if (dist[cur.second]!=-1) continue;
        dist[cur.second]=cur.first;
        //cout<<cur.second<<' '<<cur.first<<'\n';
        for (auto i:adj[cur.second]){
            pq.push(mp(cur.first+i.second,i.first));
        }
    }
    cout<<dist[e];
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j=0;j<pos[i].size();j++){
                      ~^~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43