#include<bits/stdc++.h>

using namespace std;

int c,v0,v1,a,l;

int main()

{

    ios::sync_with_stdio();

    cin >> c >> v0 >> v1 >> a >> l;

    int ans = ,now = l,v = v0-a;

    while()

    {

        ans++;

        now -= l;

        v += a;

        if(v > v1)  v = v1;

        now += v;

        if(now >= c)    break;

    }

    cout << ans << endl;

    return ;

}

#include<bits/stdc++.h>

using namespace std;

int n,a;

int main()

{

    ios::sync_with_stdio();

    cin >> n >> a;

    double t = 180.0/n;

    int ans;

    double minn = ;

    for(int i = ;i <= n-;i++)

    {

        if(abs(i*t-a) < minn)

        {

            ans = i+;

            minn = abs(i*t-a);

        }

    }

    cout << "2 1 " << ans << endl;

    return ;

}

#include<bits/stdc++.h>

using namespace std;

int n,a[],cnt[];

int main()

{

    ios::sync_with_stdio();

    cin >> n;

    for(int i = ;i <= n;i++)   cin >> a[i];

    long long sum = ,cntl = ,cntr = ;

    for(int i = ;i <= n;i++)

    {

        sum += abs(a[i]-i);

        if(a[i] >= i)

        {

            cntl++;

            cnt[a[i]-i]++;

        }

        else    cntr++;

    }

    long long ans = sum;

    int num = ;

    for(int i = ;i < n;i++)

    {

        cntl -= cnt[i-];

        cntr += cnt[i-];

        sum = sum-cntl+cntr-abs(a[n-i+]-n-)+abs(a[n-i+]-);

        if(a[n-i+]+i- < n)    cnt[a[n-i+]+i-]++;

        cntl++;

        cntr--;

        if(sum < ans)

        {

            ans = sum;

            num = i;

        }

    }

    cout << ans << " " << num << endl;

    return ;

}