Submission #570632

#	Time	Username	Problem	Language	Result	Execution time	Memory
570632		groshi	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	100 / 100	399 ms	225504 KiB

skyscraper

#include<iostream>
#include<vector>
#include<queue>
#include<utility>
using namespace std;
struct wi{
    vector<int> Q;
}*w;
bool odw[30000][30000];
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    int n,m,x,y;
    cin>>n>>m;
    int gdzie0=0,gdzie1=0;
    w=new wi[n+3];
    for(int i=1;i<=m;i++)
    {
        cin>>x>>y;
        w[x].Q.push_back(y);
        if(i==1)
            gdzie0=x;
        if(i==2)
            gdzie1=x;
    }
    queue<pair<int,pair<int,int> > > kolejka;
    kolejka.push({gdzie0,{0,0}});
    while(!kolejka.empty())
    {
        pair<int,pair<int,int> > para=kolejka.front();
        kolejka.pop();
        int x=para.first;
        if(x==gdzie1)
        {
            cout<<para.second.first;
            return 0;
        }
        int ile=para.second.first;
        int jakim=para.second.second;
        if(x-jakim>=0 && odw[x-jakim][jakim]==0)
        {
            odw[x-jakim][jakim]=1;
            kolejka.push({x-jakim,{ile+1,jakim}});
        }
        if(x+jakim<n && odw[x+jakim][jakim]==0)
        {
            odw[x+jakim][jakim]=1;
            kolejka.push({x+jakim,{ile+1,jakim}});
        }
        for(int i=0;i<w[x].Q.size();i++)
        {
            int pom=w[x].Q[i];
            if(x-pom>=0 && odw[x-pom][pom]==0)
            {
                odw[x-pom][pom]=1;
                kolejka.push({x-pom,{ile+1,pom}});
            }
            if(x+pom<n && odw[x+pom][pom]==0)
            {
                odw[x+pom][pom]=1;
                kolejka.push({x+pom,{ile+1,pom}});
            }
        }
    }
    cout<<"-1";
    return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |         for(int i=0;i<w[x].Q.size();i++)
      |                     ~^~~~~~~~~~~~~~

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