Submission #868371

#	Time	Username	Problem	Language	Result	Execution time	Memory
868371		noyancanturk	Balloons (CEOI11_bal)	C++17	0 / 100	150 ms	10576 KiB

bal

#ifndef Local
    #pragma GCC optimize("O3,unroll-loops")
#endif
#include <bits/stdc++.h>
#define int long long
#define pb push_back
using namespace std;
const int lim=2e5+1;
int mod=1e9+7;
using pii=pair<int,int>;

void solve(){
    int n;
    cin>>n;
    double x[n],r[n];
    for(int i=0;i<n;i++){
        cin>>x[i]>>r[i];
    }    
    cout<<fixed<<setprecision(3);
    stack<pair<double,double>>s;
    for(int i=0;i<n;i++){
        auto check=[&]()->bool {
            double dist=abs(x[i]-s.top().second),cur=dist*dist/(4*s.top().first);
            if(r[i]<cur)return 0;
            if(s.top().first<cur)return 1;
            return 0;
        };
        while(s.size()&&check()){
            s.pop();
        }
        if(!s.size()){
            cout<<r[i]<<"\n";
            s.push({r[i],x[i]});
            continue;
        }
        double dist=abs(x[i]-s.top().second),cur=dist*dist/(4*s.top().first);
        if(r[i]<cur){
            cout<<r[i]<<"\n";
            s.push({r[i],x[i]});
        }else{
            cout<<cur<<"\n";
            s.push({cur,x[i]});
        }
    }
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
#ifdef Local  
    freopen(".in","r",stdin);
    freopen(".out","w",stdout);
#else
    //freopen("dishes.in","r",stdin);
    //freopen("dishes.out","w",stdout);
#endif
    int t=1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
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• Subtask 10: 0 / 10