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Submission #850393

# Submission time Handle Problem Language Result Execution time Memory
850393 2023-09-16T13:47:39 Z Ahmed57 Boarding Passes (BOI22_passes) C++17
5 / 100
 2 ms 628 KB 
#include <bits/stdc++.h>
using namespace std;
int main(){
    string s;cin>>s;
    long long x = s.size();
    if(x<=2){
        cout<<0.0<<endl;return 0;
    }
    else if(x==3){
        cout<<0.5<<endl;
        return 0;
    }
    long double v1 = x/2 , v2 = x-v1;
    long double ans = ((v1*(v1-1)/2)*(v1*(v1-1)/2))/(v1*(v1-1));
    swap(v1,v2);
    ans+= ((v1*(v1-1)/2)*(v1*(v1-1)/2))/(v1*(v1-1));
    cout<<setprecision(3)<<fixed<<ans<<endl;
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB found '100800.5000000000', expected '100800.5000000000', error '0.0000000000'
2 Correct 0 ms 348 KB found '0.0000000000', expected '0.0000000000', error '-0.0000000000'
3 Correct 0 ms 348 KB found '0.0000000000', expected '0.0000000000', error '-0.0000000000'
4 Correct 0 ms 348 KB found '1.0000000000', expected '1.0000000000', error '0.0000000000'
5 Correct 0 ms 432 KB found '124002.0000000000', expected '124002.0000000000', error '0.0000000000'
6 Correct 2 ms 628 KB found '772893586.0000000000', expected '772893586.0000000000', error '0.0000000000'
7 Correct 2 ms 604 KB found '1100977812.5000000000', expected '1100977812.5000000000', error '0.0000000000'
8 Correct 2 ms 604 KB found '1249950000.5000000000', expected '1249950000.5000000000', error '0.0000000000'
9 Correct 2 ms 604 KB found '1249975000.0000000000', expected '1249975000.0000000000', error '0.0000000000'

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 1st numbers differ - expected: '1.0000000000', found: '3.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 1st numbers differ - expected: '1.0000000000', found: '3.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB found '100800.5000000000', expected '100800.5000000000', error '0.0000000000'
2 Correct 0 ms 348 KB found '0.0000000000', expected '0.0000000000', error '-0.0000000000'
3 Correct 0 ms 348 KB found '0.0000000000', expected '0.0000000000', error '-0.0000000000'
4 Correct 0 ms 348 KB found '1.0000000000', expected '1.0000000000', error '0.0000000000'
5 Correct 0 ms 432 KB found '124002.0000000000', expected '124002.0000000000', error '0.0000000000'
6 Correct 2 ms 628 KB found '772893586.0000000000', expected '772893586.0000000000', error '0.0000000000'
7 Correct 2 ms 604 KB found '1100977812.5000000000', expected '1100977812.5000000000', error '0.0000000000'
8 Correct 2 ms 604 KB found '1249950000.5000000000', expected '1249950000.5000000000', error '0.0000000000'
9 Correct 2 ms 604 KB found '1249975000.0000000000', expected '1249975000.0000000000', error '0.0000000000'
10 Incorrect 0 ms 348 KB 1st numbers differ - expected: '1.0000000000', found: '3.0000000000', error = '2.0000000000'
11 Halted 0 ms 0 KB -