Submission #948493

#	Time	Username	Problem	Language	Result	Execution time	Memory
948493		lssply	Balloons (CEOI11_bal)	C++17	100 / 100	156 ms	8692 KiB

bal

#include <bits/stdc++.h>
using namespace std;
//#define cin fin
//#define cout fout
ifstream  fin("conexidad.in");
ofstream fout("conexidad.out");

#define int unsigned long long
#define pii pair<int,int>
#define pb push_back
#define vi vector<int>
#define vp vector<pair<int,int>>

const int maxNr=2e5, mod = 1e9+7, inf = 2e9;
int n;
struct cv{double x; double r;}a[maxNr+1];

double calc(cv x, cv y)
{
    return (x.x-y.x)*(x.x-y.x)/(4*x.r);
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> n;
    for(int i=1;i<=n;i++)
        cin >> a[i].x >> a[i].r;
    stack<int>st;
    for(int i=1;i<=n;i++)
    {
        while(!st.empty())
        {
            double r=min(calc(a[st.top()], a[i]), a[i].r);
            a[i].r=r;
            if(r>=a[st.top()].r)
            {
                st.pop();
            }
            else break;
        }
        cout << fixed << setprecision(3) << a[i].r << '\n';
        st.push(i);
    }


    return 0;
}

• 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