Submission #972971

#	Time	Username	Problem	Language	Result	Execution time	Memory
972971		idas	Boarding Passes (BOI22_passes)	C++11	0 / 100	1 ms	348 KiB

passes

#include <bits/stdc++.h>
#define FAST_IO ios_base::sync_with_stdio(false); cin.tie(nullptr)
#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define sz(x) int((x).size())
#define pb push_back
#define s second
#define f first

using namespace std;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef tuple<int, int, int> tiii;
typedef long double ld;

const int INF=1e9;

const int N=1e5+10;
int n;
string s;

int main()
{
    FAST_IO;
    cin >> s; n=sz(s);

    ld ans=0;
    FOR(i, 2, (n+1)/2+1)
    {
        ld val=(i-1)/ld(i);
        ans+=val;
    }

    FOR(i, 2, n/2+1)
    {
        ld val=(i-1)/ld(i);
        ans+=val;
    }

    cout << fixed << setprecision(4) << ans;
}

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