Submission #269765

#	Time	Username	Problem	Language	Result	Execution time	Memory
269765		stefantaga	Balloons (CEOI11_bal)	C++14	40 / 100	2099 ms	1120 KiB

bal

#include <bits/stdc++.h>

using namespace std;
pair <long double,long double> centru[200005],p1;
long double raza[200005];
struct wow
{
    long double loc,raza;
}v[200005];
long double dist (pair <long double , long double> p1, pair <long double,long double> p2)
{
    return (p1.first-p2.first)*(p1.first-p2.first)+(p1.second-p2.second)*(p1.second-p2.second);
}
bool ok(long double mij,int indice)
{
    int i;
    p1={v[indice].loc,mij};
    for (i=indice-1;i>=1;i--)
    {
        if (dist(p1,centru[i])-(raza[i]+mij)*(raza[i]+mij)<1e-6)
        {
            return 0;
        }
    }
    return 1;
}
int n,i;
long double st,dr,mij,sol;
int main()
{
    ios_base :: sync_with_stdio(false);
    cin.tie(0);
    #ifdef HOME
    ifstream cin("date.in");
    ofstream cout("date.out");
    #endif // HOME
    cin>>n;
    for (i=1;i<=n;i++)
    {
        cin>>v[i].loc>>v[i].raza;
        st=1e-6;
        dr=v[i].raza;
        sol=0;
        while (dr-st>1e-6)
        {
            mij=(st+dr)/2;
            if (ok(mij,i)==1)
            {
                sol=mij;
                st=mij+1e-6;
            }
            else
            {
                dr=mij-1e-6;
            }
        }
        raza[i]=sol;
        centru[i]={v[i].loc,sol};
    }
    for (i=1;i<=n;i++)
    {
        cout<<fixed<<setprecision(3)<<raza[i]<<'\n';
    }
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10