Submission #1236484

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236484		dhuyyyy	Balloons (CEOI11_bal)	C++20	0 / 100	756 ms	1508 KiB

bal

#include <bits/stdc++.h>
using namespace std;
#define db double
const int maxx=1e5+1;
const double pi=acos(-1);
int n;
double cal(double x1,double r1,double x2,double r2)
{
    return min(((x1-x2)*(x1-x2))/(4*r1),r2);
}
int main()
{
    cin>>n;
    vector<pair<int,int>>s;
    for(int i=1;i<=n;i++)
    {
        double x,r,minn=1e9;
        cin>>x>>r;
        if(i==1)
        {
            cout<<r<<endl;
            s.push_back({x,r});
            continue;
        }
        for(int i=0;i<s.size();i++)
            minn=min(minn,cal(s[i].first,s[i].second,x,r));
        r=minn;
        while(!s.empty()&&s[s.size()-1].second<=r)s.pop_back();
        s.push_back({x,r});
        cout<<r<<endl;
    }
    return 0;
}

• Subtask 1: 0 / 10
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• Subtask 3: 0 / 10
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• Subtask 10: 0 / 10