Submission #1255742

#	Time	Username	Problem	Language	Result	Execution time	Memory
1255742		Nipphitch	Mobile (BOI12_mobile)	C++20	30 / 100	1097 ms	16096 KiB

mobile

#include <bits/stdc++.h>
using namespace std;
#define int long long 
#define double long double
const int N=1e6+5;

int n,len,x[N],y[N];

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> len;
    for(int i=1;i<=n;i++) cin >> x[i] >> y[i];
    double l=0.00,r=2.1e9+5.00;
    while(r-l>1e-4){
        double mid=l+(r-l)/2.00;
        double cur=0.00;
        for(int i=1;i<=n;i++){
            double d=sqrt(mid*mid-y[i]*y[i]);
            double a=x[i]-d,b=x[i]+d;
            if(a<=cur) cur=max(cur,b);
        }
        if(cur>=len) r=mid;
        else l=mid;
    }
    cout << fixed << setprecision(5) << l;
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 4 / 4
• Subtask 4: 4 / 4
• Subtask 5: 4 / 4
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 5
• Subtask 10: 0 / 5
• Subtask 11: 0 / 5
• Subtask 12: 0 / 5
• Subtask 13: 0 / 5
• Subtask 14: 0 / 5
• Subtask 15: 0 / 5
• Subtask 16: 0 / 5
• Subtask 17: 0 / 5
• Subtask 18: 0 / 5
• Subtask 19: 0 / 5
• Subtask 20: 0 / 5
• Subtask 21: 0 / 5