Submission #580015

#	Time	Username	Problem	Language	Result	Execution time	Memory
580015		wdjpng	Boarding Passes (BOI22_passes)	C++17	0 / 100	3 ms	468 KiB

passes

#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 (stderr)

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
• Subtask 2: 0 / 25
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40