Submission #320122

#	Time	Username	Problem	Language	Result	Execution time	Memory
320122		NicolaAbusaad2014	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	655 ms	262148 KiB

skyscraper

/**
 * Prof.Nicola
**/
#include <bits/stdc++.h>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    long long n,m,z;
    cin>>n>>m;
    long long skyscraper[m],jumps[m];
    vector<long long>doges[n];
    vector<long long>vis(m,-1e9);
    for(long i=0;i<m;i++){
        cin>>skyscraper[i]>>jumps[i];
        doges[skyscraper[i]].push_back(i);
    }
    if(skyscraper[0]==skyscraper[1]){
        cout<<0<<endl;
    }
    else{
    priority_queue<pair<long long,long> >pq;
    pq.push(make_pair(0,0));
    long long cost,doge,pos,x;
    while(!pq.empty()){
        cost=pq.top().first;
        doge=pq.top().second;
        pos=skyscraper[doge];
        pq.pop();
        if(cost>vis[doge]){
        vis[doge]=cost;
        z=pos%jumps[doge];
        for(long i=z;i<n;i+=jumps[doge]){
            x=abs(i-pos);
            x/=jumps[doge];
            for(long j=0;j<doges[i].size();j++){
            if(cost-x>vis[doges[i][j]]){
                pq.push(make_pair(cost-x,doges[i][j]));
            }
            }
        }
        }
    }
    if(vis[1]==-1e9){
        cout<<-1<<endl;
    }
    else{
        cout<<-vis[1]<<endl;
    }
    }
    return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:39:27: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |             for(long j=0;j<doges[i].size();j++){
      |                          ~^~~~~~~~~~~~~~~~

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