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답안 #550792

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
550792 2022-04-19T08:24:02 Z CyberSleeper Mobile (BOI12_mobile) C++14
50 / 100
 1000 ms 32776 KB 
#include <bits/stdc++.h>
#define fastio      ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define debug(x)    cout << "Line " << __LINE__ << ", " << #x << " is " << x << endl
#define all(x)      x.begin(), x.end()
#define fi          first
#define se          second
#define mp          make_pair
#define pb          push_back
#define ll          long long
#define ull         unsigned long long
#define pll         pair<ll, ll>
#define pii         pair<int, int>
#define pld         pair<ld, ld>
#define ld          long double
#define nl          endl
#define tb          '\t'
#define sp          ' '
#define sqr(x)      (x)*(x)
#define arr3        array<int, 3>
using namespace std;
 
const int MX=1000005, MOD=1000000007, BLOCK=160, INF=2e9+7, LG=62;
const ll INFF=1000000000000000007;
const ld ERR=1e-3, pi=3.14159265358979323846;

ll N, L;
pld A[MX];

bool valid(ld x){
    ld best=0;
    for(int i=1; i<=N; i++){
        ld dist=sqrt(x*x - A[i].se*A[i].se);
        ld le=A[i].fi-dist, ri=A[i].fi+dist;
        if(le<=best)
            best=max(best, ri);
    }
    return (L<=best);
}

int main(){
    fastio;
    cin >> N >> L;
    for(int i=1; i<=N; i++){
        cin >> A[i].fi >> A[i].se;
    }
    ld le=0, ri=2e9, mi, ans;
    while(le+ERR<=ri){
        mi=(le+ri)/2;
        if(valid(mi)){
            ri=mi;
            ans=mi;
        }else
            le=mi;
    }
    cout << fixed << setprecision(3) << ans << nl;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 340 KB Output is correct

Subtask #3
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 3 ms 396 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 472 KB Output is correct
2 Correct 4 ms 468 KB Output is correct
3 Correct 6 ms 468 KB Output is correct
4 Correct 9 ms 568 KB Output is correct

Subtask #5
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 464 KB Output is correct
2 Correct 5 ms 468 KB Output is correct
3 Correct 4 ms 420 KB Output is correct
4 Correct 7 ms 460 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 472 KB Output is correct
2 Correct 6 ms 468 KB Output is correct
3 Correct 4 ms 468 KB Output is correct
4 Correct 7 ms 508 KB Output is correct
5 Correct 5 ms 468 KB Output is correct

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 76 ms 3080 KB Output is correct
2 Correct 81 ms 3128 KB Output is correct
3 Incorrect 57 ms 2508 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 3276 KB Output is correct
2 Correct 76 ms 2980 KB Output is correct
3 Correct 103 ms 3372 KB Output is correct
4 Incorrect 89 ms 3404 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 62 ms 3584 KB Output is correct
2 Correct 75 ms 3416 KB Output is correct
3 Incorrect 82 ms 3484 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 78 ms 3900 KB Output is correct
2 Correct 75 ms 3964 KB Output is correct
3 Incorrect 78 ms 3916 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #11
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 80 ms 3924 KB Output is correct
2 Correct 97 ms 3916 KB Output is correct
3 Correct 91 ms 3916 KB Output is correct
4 Correct 133 ms 3956 KB Output is correct
5 Correct 108 ms 3988 KB Output is correct

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 330 ms 16488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 401 ms 16660 KB Output is correct
2 Correct 552 ms 17080 KB Output is correct
3 Correct 407 ms 16856 KB Output is correct
4 Correct 692 ms 16840 KB Output is correct
5 Incorrect 566 ms 17004 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #14
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 398 ms 19620 KB Output is correct
2 Correct 454 ms 20028 KB Output is correct
3 Correct 468 ms 20084 KB Output is correct
4 Correct 848 ms 20264 KB Output is correct
5 Correct 670 ms 19996 KB Output is correct

Subtask #15
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 462 ms 19492 KB Output is correct
2 Correct 703 ms 19876 KB Output is correct
3 Correct 484 ms 19880 KB Output is correct
4 Correct 950 ms 20008 KB Output is correct
5 Correct 681 ms 20048 KB Output is correct

Subtask #16
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 531 ms 22984 KB Output is correct
2 Correct 544 ms 23136 KB Output is correct
3 Correct 492 ms 22484 KB Output is correct
4 Correct 935 ms 22888 KB Output is correct
5 Correct 848 ms 30828 KB Output is correct

Subtask #17
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 547 ms 22700 KB Output is correct
2 Correct 721 ms 22748 KB Output is correct
3 Correct 593 ms 22988 KB Output is correct
4 Correct 899 ms 23244 KB Output is correct
5 Correct 872 ms 22852 KB Output is correct

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 495 ms 26016 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 639 ms 26136 KB Output is correct
2 Correct 842 ms 26228 KB Output is correct
3 Correct 625 ms 26052 KB Output is correct
4 Execution timed out 1062 ms 26348 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 630 ms 32408 KB Output is correct
2 Correct 799 ms 32664 KB Output is correct
3 Correct 752 ms 32776 KB Output is correct
4 Execution timed out 1074 ms 32076 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 773 ms 32648 KB Output is correct
2 Execution timed out 1043 ms 32736 KB Time limit exceeded
3 Halted 0 ms 0 KB -