Submission #1266725

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266725		tritranminh2808	Balloons (CEOI11_bal)	C++20	60 / 100	2093 ms	13964 KiB

bal

#include <bits/stdc++.h>
// #define int long long 
using namespace std;
int x[200005],r[200005];
long double ans[200005];
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n; cin >> n;
    for(int i=1;i<=n;i++)  cin>> x[i] >> r[i];
    // stack <int> st;
    set<pair <long double, int > > st;
    ans[1]=r[1]*1.0;
    st.insert({1.0*(r[1]+x[1]),1});
    for(int i=2;i<=n;i++){
        long double cur=r[i]*1.0;
        vector <pair <long double , int > > xet;
        int dd=50;
        while(dd--&&!st.empty()){
            xet.push_back(*st.rbegin());
            st.erase(xet.back());
        }
        for(auto k:xet){
            long double xj=x[k.second],rj=ans[k.second];
            long double ri=1.0*(x[i]-xj)*(x[i]-xj)/(4.0*rj);
            cur=min(cur,ri);
        }
        ans[i]=cur;
        st.insert({1.0*(ans[i]+x[i]),i});
        for(auto j:xet) st.insert(j);
    }
    for(int i=1;i<=n;i++) cout << fixed << setprecision(3) << ans[i] << "\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: 0 / 10
• Subtask 7: 10 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10