Submission #1323149

#	Time	Username	Problem	Language	Result	Execution time	Memory
1323149		NValchanov	Boarding Passes (BOI22_passes)	C++20	5 / 100	2 ms	568 KiB

passes

#include <iostream>
#include <string>

using namespace std;

typedef long long llong;

int main()
{
    string s;
    cin >> s;

    int n = s.size();

    llong l = n / 2;
    llong r = (n + 1) / 2;

    llong sum = l * (l - 1) / 2LL + r * (r - 1) / 2LL;

    cout << sum / 2;

    if(sum % 2 == 1)
    {
        cout << ".5" << endl;
    }
    else
    {
        cout << endl;
    }

    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 25
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40