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Submission #211450

# Submission time Handle Problem Language Result Execution time Memory
211450 2020-03-20T11:18:37 Z Andrei_Cotor Balloons (CEOI11_bal) C++11
100 / 100
 306 ms 8844 KB 
#include<iostream>
#include<queue>
#include<iomanip>

using namespace std;

long double getrad(long double x, long double xx, long double rr)
{
    long double r=((x-xx)*(x-xx))/(4*rr);
    return r;
}

deque<pair<long double,long double> > Q;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin>>n;

    for(int i=1; i<=n; i++)
    {
        long double x,rmax;
        cin>>x>>rmax;

        long double r=rmax;
        while(!Q.empty())
        {
            long double xx=Q.back().first;
            long double rr=Q.back().second;

            r=min(r,getrad(x,xx,rr));

            if(r>rr)
                Q.pop_back();
            else
                break;
        }

        cout<<setprecision(3)<<fixed<<r<<"\n";
        Q.push_back({x,r});
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 384 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 768 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 1524 KB 50000 numbers
2 Correct 72 ms 2428 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 157 ms 1912 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 164 ms 2152 KB 115362 numbers
2 Correct 170 ms 5728 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 225 ms 2300 KB 154271 numbers
2 Correct 286 ms 8784 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 306 ms 2444 KB 200000 numbers
2 Correct 285 ms 8844 KB 199945 numbers