Submission #1096173

#	Time	Username	Problem	Language	Result	Execution time	Memory
1096173		Omar_Elgedawy	Mobile (BOI12_mobile)	C++17	80 / 100	1073 ms	50768 KiB

mobile

#include <bits/stdc++.h>

using namespace std;
#define int long long
#define ld long double
#define F first
#define S second
#define el '\n'
#define cout(x) for(auto v:x)cout<<v<<el
#define coutp(x) for(auto v:x)cout<<v.F<<' '<<v.S<<el
#define cin(x) for(auto &v:x)cin>>v;
#define pb(x) push_back(x)
#define all(x)  x.begin(),x.end()

const int N = 5e3 + 5, M = 1e2 + 5, Mod = 1e9 + 7;
int dx[8] = {1, -1, 0, 0, 1, -1, 1, -1};
int dy[8] = {0, 0, 1, -1, 1, -1, -1, 1};

int nxt()
{
    int x;
    cin >> x;
    return x;
}
void solve(int h)
{
    int n;
    ld m;
    cin>>n>>m;
    ld x[n],y[n];
    for(int i=0;i<n;i++)
    {
        cin>>x[i]>>y[i];
    }
    ld l=1,r=2e9;
    while(r-l>1e-3)
    {
        ld mid=(r+l)/2.0;
        ld cur=0;
        for(int i=0;i<n;i++)
        {
            ld dist=sqrt(mid*mid-y[i]*y[i]);
            ld left=x[i]-dist;
            ld right=x[i]+dist;
            if(left<=cur)cur=max(cur,right);
        }
        if(cur>=m)
            r=mid;
        else
            l=mid;
    }
    cout<<fixed<<setprecision(4)<<l;
}

int32_t main()
{
    // #ifndef ONLINE_JUDGE
    // freopen("input.txt", "r" , stdin);
    // freopen("output.txt", "w", stdout);
    // freopen("feast.in", "r", stdin);
    // freopen("feast.out", "w", stdout);
    // #endif
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int tc = 1;
    // cin >> tc;
    for (int i = 1; i <= tc; i++)solve(i);
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 4 / 4
• Subtask 4: 4 / 4
• Subtask 5: 4 / 4
• Subtask 6: 5 / 5
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• Subtask 11: 5 / 5
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• Subtask 14: 5 / 5
• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
• Subtask 17: 5 / 5
• Subtask 18: 0 / 5
• Subtask 19: 0 / 5
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• Subtask 21: 0 / 5