oj.uz

답안 #853871

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
853871 2023-09-25T11:12:38 Z laurasofia Mobile (BOI12_mobile) C++14
0 / 100
 1000 ms 38228 KB 
#include <bits/stdc++.h>
using namespace std;
#define vv vector<lli>
#define vvi vector<vector<int>>
#define vii vector<pr>
#define pr pair<double,double>
#define F first
#define S second
#define all(v) v.begin(), v.end()
#define lli long long
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define mkp make_pair
#define fast ios::sync_with_stdio(false);cin.tie(0);


int l,n;
vector<pr > v;

pr g(double r, double x, double y){
    pr res={0,0};
    if (abs(y)>=r)return res;
    r=r*r;
    res.first=x-sqrt(r-(y*y));
    res.second=x+sqrt(r-(y*y));
    return res;
}

bool check(double r){

    
    vector<pr> q(n+1);
    //q[n]=make_pair(0,0);
    q[n]=make_pair(l,l);

    FOR(i,0,n){
        q[i]=g(r,v[i].first, v[i].second);
    }
    sort(q.begin(),q.end());

    double last=0;
    pr lll=make_pair(l,l);
    FOR(i,0,n){
        
        if (q[i].first>last)return false;
        if (q[i]==lll)return true;
        last=max(last, q[i].second);
    }
    return true;
   
}

void fun(){

    double l,m, r;
    l=0;
    r=1000000000;

    FOR(i,0,100){
        m=(l+r)/2;
        if (check(m))r=m;
        else l=m;
    }
    if (check(l))r=l;
    cout<<r<<endl;
}

int main(){ 
    ios::sync_with_stdio(0); cin.tie(0);
  //  freopen("out.txt", "w", stdout);
    cin>>n>>l;
    v=vector<pr>(n);

    FOR(i,0,n)cin>>v[i].first>>v[i].second;
    
    fun();
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 1 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 348 KB Output is correct
2 Incorrect 6 ms 560 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 604 KB Output is correct
2 Incorrect 12 ms 604 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 600 KB Output is correct
2 Incorrect 13 ms 856 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 15 ms 860 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 245 ms 3516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 299 ms 3208 KB Output is correct
2 Correct 283 ms 3424 KB Output is correct
3 Incorrect 313 ms 3680 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 283 ms 3668 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 379 ms 4432 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 388 ms 4604 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1041 ms 18112 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1012 ms 19656 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1062 ms 21684 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1029 ms 23216 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1036 ms 24916 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1039 ms 26876 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1060 ms 28372 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1025 ms 30892 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1040 ms 35148 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1054 ms 38228 KB Time limit exceeded
2 Halted 0 ms 0 KB -