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Submission #1105021

# Submission time Handle Problem Language Result Execution time Memory
1105021 2024-10-25T07:51:33 Z ezzzay Balloons (CEOI11_bal) C++14
20 / 100
 2000 ms 7312 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
double x[N],r[N];
double p[N];
bool check(int i, int j, double R){
    double xj=x[j],yj=p[j],rj=p[j];
    double xi=x[i],yi=R,ri=R;
    double d=(xi-xj)*(xi-xj)+(yi-yj)*(yi-yj);
    double f=rj+ri;
    if(f*f<=d){
        return 1;
    }
    else{
        return 0;
    }
}
signed main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>x[i]>>r[i];
    }
    p[1]=r[1];
    for(int i=2;i<=n;i++){
        double lo=0,hi=r[i];
        while(hi>=lo){
            double mid=(hi+lo)/2;
            bool u=1;
            for(int j=1;j<i;j++){
                u&=check(i,j,mid);
            }
            if(u){
                lo=mid+0.0001;
            }
            else{
                hi=mid-0.0001;
            }
        }
        p[i]=hi;
    }
    for(int i=1;i<=n;i++){
        cout<<fixed<<setprecision(3)<<p[i]<<endl;
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB 2 numbers

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 4552 KB 480th numbers differ - expected: '22.8290000000', found: '22.8260000000', error = '0.0030000000'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 47 ms 4432 KB 397th numbers differ - expected: '137.2240000000', found: '137.2270000000', error = '0.0030000000'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2061 ms 5036 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2060 ms 5372 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2045 ms 5960 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2043 ms 6472 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2048 ms 6884 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2054 ms 7312 KB Time limit exceeded
2 Halted 0 ms 0 KB -