답안 #970743

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
970743	2024-04-27T07:58:15 Z	hihihihaw	Mobile (BOI12_mobile)	C++17	40 / 100	1000 ms	83392 KB

mobile

#pragma GCC optimize("O3,unroll-loops")    
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define pb push_back
#define pii pair<int,int>
#define sz(v) (int)v.size()
#define fi first
#define se second
#define INF 1223372036854775807
#define MOD 1000000007
#define cint(x) int x;cin>>x;
#define cinarr(a,n) int a[n];for (int i=0;i<n;i++) cin>>a[i];
#define coutarr(a) for (auto d:a)cout<<d<<" "; cout<<endl;
#define coutarrD(a) for (auto d:a) cout<<d.fi<<","<<d.se<<" "; cout<<endl;
#define AYBERK_SARICA ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define endl '\n'
#define ld long double
#define mid (start+end)/2

int t=1;
int interactive=0;
int usaco=0;
int testCase=0;
int n,k;
vector<pair<ld,ld>> v;
bool f(ld x){
    vector<pair<ld,ld>> z;
    for (int i=0;i<n;i++){
        if (x*x-v[i].se*v[i].se>0){
            ld y=sqrt(x*x-v[i].se*v[i].se);
            if (v[i].fi+y<0 || v[i].fi-y>k) continue;
            z.pb({max(v[i].fi-y,(ld)0),min(v[i].fi+y,(ld)k)});
        }
    }
    sort(z.begin(),z.end());
    ld b=0;
    for (int i=0;i<sz(z);i++){
        if (z[i].fi>b){
            return false;
        }
        else{
            b=max(z[i].se,b);
        }
    }
    if (b!=k) return false;
    return true;
}

void solve(){
    cin>>n>>k;
    for (int i=0;i<n;i++){
        ld x,y;
        cin>>x>>y;
        v.pb({x,y});
    }
    ld l=0,r=2000000000;
    int y=60;
    while (y--){
        ld m=(l+r)/2;
        if (f(m)) r=m;
        else l=m;
    }
    cout<<setprecision(10)<<l<<endl;
    

    
    
    

    
    


    
    
    
    
    

    

    
    

    

    
}



 
 
    
 
 
 
 
 
int32_t main(){
    AYBERK_SARICA;
    if (usaco){
        freopen("socdist.in", "r", stdin);
        freopen("socdist.out", "w", stdout);
    }
    if (!interactive){
    #ifdef Local
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
        //freopen("wormsort.out", "w", stdout);
    #endif
    }
    if (t==1) solve();
    else{
        cin>>t;
        while (t--){testCase++;solve();}
    }
    
        
    return 0;
}

Compilation message

mobile.cpp: In function 'int32_t main()':
mobile.cpp:105:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |         freopen("socdist.in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
mobile.cpp:106:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  106 |         freopen("socdist.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

#	결과	메모리	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	344 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	456 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	772 KB	Output is correct
2	Correct	12 ms	776 KB	Output is correct
3	Correct	8 ms	604 KB	Output is correct
4	Correct	5 ms	784 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	19 ms	1256 KB	Output is correct
2	Correct	26 ms	1132 KB	Output is correct
3	Correct	35 ms	1076 KB	Output is correct
4	Correct	13 ms	1100 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	1100 KB	Output is correct
2	Correct	26 ms	1120 KB	Output is correct
3	Correct	36 ms	1096 KB	Output is correct
4	Correct	11 ms	1128 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	17 ms	1080 KB	Output is correct
2	Correct	26 ms	1108 KB	Output is correct
3	Correct	42 ms	1076 KB	Output is correct
4	Correct	10 ms	1124 KB	Output is correct
5	Correct	18 ms	1080 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	267 ms	10536 KB	Output is correct
2	Correct	632 ms	12992 KB	Output is correct
3	Correct	421 ms	6504 KB	Output is correct
4	Correct	176 ms	12996 KB	Output is correct
5	Correct	205 ms	6168 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	300 ms	12584 KB	Output is correct
2	Correct	238 ms	12480 KB	Output is correct
3	Correct	237 ms	12992 KB	Output is correct
4	Correct	192 ms	12524 KB	Output is correct
5	Correct	164 ms	13048 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	683 ms	11456 KB	Output is correct
2	Correct	696 ms	11716 KB	Output is correct
3	Correct	955 ms	11196 KB	Output is correct
4	Correct	125 ms	12980 KB	Output is correct
5	Correct	324 ms	12036 KB	Output is correct

Subtask #10
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	634 ms	11028 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	275 ms	11276 KB	Output is correct
2	Correct	873 ms	12724 KB	Output is correct
3	Execution timed out	1022 ms	12480 KB	Time limit exceeded
4	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Execution timed out	1039 ms	48204 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	1048 ms	48692 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	1103 ms	72048 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	1028 ms	71648 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	1012 ms	74592 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	1056 ms	73356 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	1033 ms	76452 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	1031 ms	76496 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	1029 ms	81284 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	1029 ms	83392 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-