oj.uz

Submission #738450

# Submission time Handle Problem Language Result Execution time Memory
738450 2023-05-08T19:15:12 Z LKR__enjoyer Mobile (BOI12_mobile) C++17
8 / 100
 1000 ms 57612 KB 
#include <iostream>
#include<bits/stdc++.h>
#define pb push_back
#define f first
#define s second
typedef long long ll;
typedef long double ld;
using namespace std;
int n,l;
vector<pair<int,int>> pkt;
bool spr(long double rad);
long double bin(ld lo,ld hi)
{
    for(int i=0;i<100;i++)
    {
        ld mid=(lo+hi)/2; 
        if(spr(mid))hi=mid; else lo=mid;
    }
    return lo;
}

int main()
{ 
    cin>>n>>l;
    for(int i=0;i<n;i++)
    {int a,b; cin>>a>>b;
    pkt.pb({a,b});    
    }
    cout<<fixed<<setprecision(4)<<bin(0,(ld)(2*l));
    
    return 0;
}
bool spr(ld rad){
vector<pair<ld,ld>> pts={};
for(auto p : pkt)
{
    ld x=(ld)p.f,y=(ld)p.s;
    if(rad*rad<y*y)continue; 
    ld x1=x-sqrt(rad*rad-y*y),x2=x+sqrt(rad*rad-y*y); 
    pts.pb({x1,x2});
}
sort(pts.begin(),pts.end());

if(pts[0].f>0)return 0;    
ld maxi=pts[0].s;
for(int i=1;i<pts.size();i++)
{if(pts[i].f>maxi)return 0; maxi=max(maxi,pts[i].s); if(pts[i].s>=(ld)l)break;}
    if(maxi<ld(l))return 0;
return 1;    
}

Compilation message

mobile.cpp: In function 'bool spr(ld)':
mobile.cpp:46:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long double, long double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 | for(int i=1;i<pts.size();i++)
      |             ~^~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 468 KB Output is correct
2 Runtime error 5 ms 724 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 724 KB Output is correct
2 Correct 40 ms 752 KB Output is correct
3 Correct 52 ms 724 KB Output is correct
4 Correct 7 ms 724 KB Output is correct

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 724 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 6 ms 788 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 119 ms 7448 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 82 ms 5028 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 953 ms 7980 KB Output is correct
2 Execution timed out 1084 ms 7776 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1067 ms 8508 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 982 ms 8380 KB Output is correct
2 Execution timed out 1075 ms 8532 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1066 ms 36512 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1056 ms 36424 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1080 ms 54308 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1074 ms 54344 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1085 ms 55076 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1080 ms 55136 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1066 ms 55864 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1090 ms 55800 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1079 ms 57364 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1063 ms 57612 KB Time limit exceeded
2 Halted 0 ms 0 KB -