Submission #1183049

#	Time	Username	Problem	Language	Result	Execution time	Memory
1183049		aminjon__	Balloons (CEOI11_bal)	C++17	40 / 100	2095 ms	6468 KiB

bal

#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define endl '\n'
typedef unsigned int uint;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
using namespace std;

const ld Eps = 1e-5;

ld dist(ld x1, ld y1, ld x2, ld y2)
{
    return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}

void solve()
{
    ll n;
    cin >> n;

    vector<ll> x(n + 1);
    vector<ll> r(n + 1);
    ll last = -1;
    vector<ld> ans(n + 1);
    for (int i = 1; i <= n; i++)
    {
        cin >> x[i] >> r[i];

        if (i == 1)
        {
            last = i;
            ans[i] = r[i];
            continue;
        }
        ld L = 0, R = r[i];
        while (L + Eps < R)
        {
            ld mid = (L + R) / 2.0;
            bool ok = 1;
            for (int j = 1; j < i; j++)
            {

                if (dist(x[j], ans[j], x[i], mid) + Eps > ans[j] + mid)
                {
                    // L = mid;
                }
                else
                {
                    ok = 0;
                }
            }
            if(ok){
                L = mid;
            }
            else{
                R = mid;
            }
        }
        ans[i] = L;
    }
    cout<<fixed<<setprecision(10);
    for(int i = 1;i <= n;i++){
        cout<<ans[i]<<endl;
    }
}
signed main()
{
    ios_base::sync_with_stdio(NULL);
    cin.tie(NULL);
    cout.tie(NULL);
    ll t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
    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