Submission #768159

#	Time	Username	Problem	Language	Result	Execution time	Memory
768159		vjudge1	Balloons (CEOI11_bal)	C++17	20 / 100	381 ms	9332 KiB

bal

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define double long double
const int N=2e5;
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);
}
dt a[N+10];
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;
    int mx =1;
    cout <<fixed<<setprecision(9)<<a[1].r<<endl;
    for (int i=2;i<=n;i++){
        double R = a[i].r;
        R = min(R,Ri(a[i],a[mx]));
        if (R != a[i].r)
            R-=0.0000000001;
        a[i].r=R;
        if (a[i].x+a[i].r>a[mx].x+a[mx].r) mx =i;
        cout <<fixed<<setprecision(9)<<R<<endl;

    }

}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 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