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Submission #1116625

# Submission time Handle Problem Language Result Execution time Memory
1116625 2024-11-22T02:42:11 Z pemguimn Balloons (CEOI11_bal) C++17
20 / 100
 104 ms 6728 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
const int N = 2e5 + 5;
 
int n, x[N], r[N];
 
long double ans[N];
 
long double calc(int i, int j){
    double x1 = x[i], y1 = ans[i];
    double x2 = x[j];
    return (x1 * x1 + x2 * x2 - 2 * x1 * x2 ) / (4 * y1);
}
 
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
  
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> x[i] >> r[i];
        ans[i] = r[i];
    }
 
    stack<int> st;
    for(int i = 1; i <= n; i++){
        long double reach = r[i];
        for(int j = i - 1; j >= 1; j--){
          if(x[i] - x[j] >= reach + ans[j]) break;
          reach = min(reach, calc(j, i));
        }
        ans[i] = reach;
    }
 
 
    for(int i = 1; i <= n; i++)
        cout << setprecision(3) << fixed << ans[i] << "\n";
 
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB 2 numbers

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 336 KB 3rd numbers differ - expected: '0.0420000000', found: '3.0000000000', error = '2.9580000000'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 336 KB 399th numbers differ - expected: '9.9760000000', found: '37.0000000000', error = '27.0240000000'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 1104 KB 1209th numbers differ - expected: '72.2820000000', found: '178.0000000000', error = '105.7180000000'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 27 ms 2040 KB 9349th numbers differ - expected: '5056.0090000000', found: '5056.0070000000', error = '0.0020000000'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 57 ms 3656 KB 7236th numbers differ - expected: '0.0070000000', found: '7.0000000000', error = '6.9930000000'
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 4168 KB 4645th numbers differ - expected: '0.0260000000', found: '8.0000000000', error = '7.9740000000'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 104 ms 5192 KB 1736th numbers differ - expected: '0.0050000000', found: '3.0000000000', error = '2.9950000000'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 102 ms 6728 KB 2718th numbers differ - expected: '2.2100000000', found: '3.0000000000', error = '0.7900000000'
2 Halted 0 ms 0 KB -