Submission #521705

#	Time	Username	Problem	Language	Result	Execution time	Memory
521705		AmirElarbi	Balloons (CEOI11_bal)	C++14	100 / 100	437 ms	14912 KiB

bal

#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e16
#define eps 1e-7
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
#define V 450
using namespace std;
const int MOD = 1e9+7;
const int nax = 2e5+5;
ve<pair<long double,long double>> s;
long double r[nax];
int main(){ 
    optimise;
    int n;
    cin >> n;
    for (int i = 0; i < n; ++i)
    {
        long double x,mr;
        cin >> x >> mr;
        s.pb({x,mr});
    }
    stack<int> st;
    for (int i = 0; i < n; ++i)
    {
        long double mx = s[i].se;
        while (!st.empty())
        {
            pair<long double,long double> a = s[st.top()];
            long double b = (long double)((s[i].fi-a.fi)*(s[i].fi-a.fi))/(long double) (4*r[st.top()]);
            mx = min(b,mx);
            if(mx >= r[st.top()]){
                st.pop();
            } else {
                break;
            }
        }
        st.push(i);
        r[i] = mx;
        cout <<fixed << setprecision(3) << mx << 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