oj.uz

Submission #580015

# Submission time Handle Problem Language Result Execution time Memory
580015 2022-06-20T13:28:33 Z wdjpng Boarding Passes (BOI22_passes) C++17
0 / 100
 3 ms 468 KB 
#include <bits/stdc++.h>

#define int long long
#define rep(i,n) for(int i =0; i<n; i++)
#define all(a) a.begin(),a.end()

using namespace std;

long double f(int n)
{
    return ((long double) n)*((long double) (n-1))/4.0;
}
signed main()
{
    string s;
    cin>>s;
    int n = s.size();
    // cin>>n;
    
    double sum = f(n/2) + f((n+1)/2);
    cout.precision(10);
    cout<<f(n/2) + f((n+1)/2)<<'\n';
}

Compilation message

passes.cpp: In function 'int main()':
passes.cpp:20:12: warning: unused variable 'sum' [-Wunused-variable]
   20 |     double sum = f(n/2) + f((n+1)/2);
      |            ^~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Incorrect 3 ms 468 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Incorrect 3 ms 468 KB Output isn't correct
8 Halted 0 ms 0 KB -