Submission #768197

#	Time	Username	Problem	Language	Result	Execution time	Memory
768197		vjudge1	Balloons (CEOI11_bal)	C++17	100 / 100	436 ms	12872 KiB

bal

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define double long double
const int N=2e5, pi=3.14;
int n;
struct dt{
    double x,r;
};
double Ri(dt b, dt c){
    return (b.x-c.x)*(b.x-c.x)/(4*c.r);
}
double area(dt b){
    return b.r*b.r*3.14;
}
dt a[N+10];
deque<dt> q;
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin>>n;
    for (int i=1;i<=n;i++)
        cin>>a[i].x>>a[i].r;
    for (int i=1;i<=n;i++){
        double R = a[i].r;
        while(!q.empty()){
            R = min(R,Ri(a[i],q.back()));
            if (R<q.back().r)
                break;
            else
                q.pop_back();
        }
        q.push_back({a[i].x,R});
        if (R != a[i].r) R-=0.000000001;
        cout <<fixed<<setprecision(9)<<R<<endl;

    }

}

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