제출 #394903

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
394903		ak2006	Balloons (CEOI11_bal)	C++14	100 / 100	184 ms	16412 KiB

bal

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
const ll mod = 1e9 + 7,inf = 1e18;
const ld eps = 1e-3;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int n = 2e5 + 5;
vvi a(n,vi(2));
int main()
{
    fast;
    cin>>n;
    for (int i = 0;i<n;i++)cin>>a[i][0]>>a[i][1];
    deque<pair<ld,ld>>st;
    for (int i = 0;i<n;i++){
        if (st.empty()){
            st.push_back({a[i][0],a[i][1]});
            cout<<fixed<<setprecision(3)<<a[i][1]<<'\n';
            continue;
        }
        else{
            ld ri = a[i][1],xi = a[i][0];
            while (!st.empty()){
                ld rj = st.back().second,xj = st.back().first;
                ri = min(ri,((xj - xi) * (xj - xi)) / (4 * rj));
                if ((ri - rj) < -eps)break;
                st.pop_back();
            }
            st.push_back({xi,ri});
            cout<<fixed<<setprecision(3)<<ri<<'\n';
        }
    }
    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