Submission #823755

#	Time	Username	Problem	Language	Result	Execution time	Memory
823755		PoonYaPat	Boarding Passes (BOI22_passes)	C++14	5 / 100	1 ms	468 KiB

passes

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

ll ans,n;

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    string s; cin>>s;
    n=s.size();
    if (n%2==0) ans=(n/2)*((n/2)-1);
    else ans=(n/2)*(n/2);

    if (ans%2==0) cout<<ans/2;
    else cout<<ans/2<<".5";
}

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