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Submission #863853

# Submission time Handle Problem Language Result Execution time Memory
863853 2023-10-21T09:11:22 Z Abito Balloons (CEOI11_bal) C++17
10 / 100
 226 ms 20492 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
#define int long long
#define y1 YONE
typedef unsigned long long ull;
using namespace std;
const int N=2e5+5;
double a[N],x[N],R[N];
int n;
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    cin>>n;
    for (int i=1;i<=n;i++) cin>>x[i]>>a[i];
    set<pair<double,int>> s;
    R[1]=a[1];
    s.ep({4.0*R[1]+x[1],1});
    for (int i=2;i<=n;i++){
        double l=0,r=a[i],mid,ans;
        int j=(*--s.end()).S;
        for (int hhh=0;hhh<50;hhh++){
            mid=(l+r)/2;
            bool ok=((x[i]-x[j])*(x[i]-x[j])>=4*mid*R[j] || (x[i]-x[1])*(x[i]-x[1])>=4*mid*R[1]);
            if (ok){
                ans=mid;
                l=mid;
            }else r=mid;
        }R[i]=ans;
        s.ep({4.0*R[i]+x[i],i});
    }for (int i=1;i<=n;i++) cout<<fixed<<setprecision(9)<<R[i]<<endl;
    return 0;
}

Compilation message

bal.cpp: In function 'int32_t main()':
bal.cpp:37:18: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   37 |         s.ep({4.0*R[i]+x[i],i});
      |               ~~~^~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4444 KB 4th numbers differ - expected: '1.8420000000', found: '87.0000000000', error = '85.1580000000'
2 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB 2 numbers

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4568 KB 7th numbers differ - expected: '0.0010000000', found: '9.0000000000', error = '8.9990000000'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 4700 KB 3rd numbers differ - expected: '121.0000000000', found: '123.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 6224 KB 3rd numbers differ - expected: '211.0000000000', found: '213.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 56 ms 8524 KB 5th numbers differ - expected: '15395.0000000000', found: '15396.0000000000', error = '1.0000000000'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 118 ms 12372 KB 3rd numbers differ - expected: '7936.0000000000', found: '10352.0000000000', error = '2416.0000000000'
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 134 ms 13652 KB 5th numbers differ - expected: '5054.0000000000', found: '5055.0000000000', error = '1.0000000000'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 179 ms 16724 KB 3rd numbers differ - expected: '1872.0000000000', found: '1874.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 226 ms 20492 KB 3rd numbers differ - expected: '2960.0000000000', found: '2962.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -