Submission #260412

#	Time	Username	Problem	Language	Result	Execution time	Memory
260412		stefantaga	Tower Defense (CEOI19_towerdefense)	C++14	53 / 100	1 ms	384 KiB

towerdefense

#include <bits/stdc++.h>

using namespace std;
long long x,y,x2,y2,dist,nr,sensx,sensy,val,i;
int main()
{
    cin>> x2 >> y2;
    cin>> x >> y;
    cin>>nr;
    dist=abs(x-x2)+abs(y-y2);
    if (dist>nr)
    {
        cout<<"impossible";
        return 0;
    }
    if (dist==nr)
    {
        cout<<"0";
        return 0;
    }
    if (dist==1)
    {
        cout<<"impossible";
        return 0;
    }
    if ((nr-dist)%2==1)
    {
        cout<<"impossible";
        return 0;
    }
    if (x!=x2&&y!=y2)
    {
        if (x<x2)
        {
            sensx=-1;
        }
        else
        {
            sensx=1;
        }
        if (y<y2)
        {
            sensy=-1;
        }
        else
        {
            sensy=1;
        }
        if (dist==2&&nr<dist+4)
        {
            cout<<"impossible";
            return 0;
        }
        if (dist==2)
        {
            val=(nr-dist-4)/2+1;
        }
        else
        {
           val=(nr-dist)/2;
        }
        cout<<val*2<<'\n';
        for (i=1;i<=val;i++)
        {
            cout<<x2+sensx*i<<" "<<y2<<'\n';
            cout<<x2<<" "<<y2+sensy*i<<'\n';
        }
    }
    else
    if (y==y2)
    {
        if (x<x2)
        {
            sensx=-1;
        }
        else
        {
            sensx=1;
        }
        val=(nr-dist)/2;
        cout<<2*(val-1)+1<<'\n';
        cout<<x2+sensx<<" "<<y<<'\n';
        for (i=2;i<=val;i++)
        {
            cout<<x2+sensx<<" "<<y-i+1<<'\n';
            cout<<x2+sensx<<" "<<y+i-1<<'\n';
        }
    }
    else
    if (x==x2)
    {
        if (y<y2)
        {
            sensy=-1;
        }
        else
        {
            sensy=1;
        }
        val=(nr-dist)/2;
        cout<<2*(val-1)+1<<'\n';
        cout<<x2<<" "<<y+sensy<<'\n';
        for (i=2;i<=val;i++)
        {
            cout<<x2-i+1<<" "<<y+sensy<<'\n';
            cout<<x2+i-1<<" "<<y+sensy<<'\n';
        }
    }
    return 0;
}

• Subtask 1: 25 / 25
• Subtask 2: 28 / 28
• Subtask 3: 0 / 47