답안 #1057609

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1057609	2024-08-14T00:19:27 Z	lucascgar	Mobile (BOI12_mobile)	C++17	100 / 100	564 ms	35316 KB

mobile

#include <bits/stdc++.h>

// #pragma GCC optimize("Ofast,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

using namespace std;

/*
chutar resposta x:
na ordem dada se torre pega ponto r, atualizar r pro maior ponto com distância menor que x
(ordem é sempre ótima pq se um cara à direita é melhor que um à esquerda p atingir r, então ele é melhor pra ir p direita tb)
se nn chguei até l, deu errado
se não, nn é

achar pontos p torre: busca binária

pitágoras p nn dar TLE:
p[i].second^2 + ex^2 = x^2
ex^2 = x^2 - p[i].second^2
ex = sqrt(x^2 - p[i].second^2)

*/

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); // overclock random

typedef pair<int,int> pii;
typedef pair<long long, long long> pll;
typedef pair<long double, long double> pdd;

const int MAXN = 1e6+10;
const double PRECISION = 1e-5;

long double dist(pdd a, pdd b){
    long double x = abs(a.first-b.first), y = abs(a.second-b.second);
    return x*x + y*y;
}

pll p[MAXN];
int l;

signed main(){
    std::ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    // freopen("test.in", "r", stdin);
    // freopen("test.out", "w", stdout);
    cout << fixed << setprecision(6);

    int n;
    cin >> n >> l;

    for (int i=0;i<n;i++){
        cin >> p[i].first >> p[i].second;
    }

    long double in=0, fi = 2e9, me;

    for (int q=0;q<100;q++){
        me = (in+fi)/2.00;
        long double sq = me*me;
        long double r=0;
        bool vl = 1;
        for (int i=0;i<n;i++){
            if (dist(p[i], {r, 0}) <= sq){
                vl=0;
                if (dist(p[i], {l, 0}) <= sq) r=l;
                else{
                    // pitagoras
                    long double ex = sqrtl(sq - (p[i].second*p[i].second));
                    if (p[i].first+ex > r) r = p[i].first+ex;
                }
            }
            if (r==l) break;
        }


        vl = vl || (l!=r);
        if (vl) in=me;
        else fi=me;

    }

    cout << in << '\n';

    return 0;
}

Subtask #1
4.0 / 4.0

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

Subtask #2
4.0 / 4.0

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

Subtask #3
4.0 / 4.0

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

Subtask #4
4.0 / 4.0

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

Subtask #5
4.0 / 4.0

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

Subtask #6
5.0 / 5.0

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

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	27 ms	2808 KB	Output is correct
2	Correct	13 ms	2652 KB	Output is correct
3	Correct	10 ms	2652 KB	Output is correct
4	Correct	20 ms	2652 KB	Output is correct
5	Correct	11 ms	2652 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	17 ms	2696 KB	Output is correct
2	Correct	17 ms	2648 KB	Output is correct
3	Correct	24 ms	2652 KB	Output is correct
4	Correct	21 ms	2652 KB	Output is correct
5	Correct	24 ms	2652 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	44 ms	2652 KB	Output is correct
2	Correct	17 ms	3676 KB	Output is correct
3	Correct	18 ms	3660 KB	Output is correct
4	Correct	30 ms	4600 KB	Output is correct
5	Correct	20 ms	3420 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	18 ms	2652 KB	Output is correct
2	Correct	16 ms	2652 KB	Output is correct
3	Correct	18 ms	2700 KB	Output is correct
4	Correct	30 ms	2700 KB	Output is correct
5	Correct	24 ms	2696 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	39 ms	2652 KB	Output is correct
2	Correct	17 ms	2704 KB	Output is correct
3	Correct	20 ms	2652 KB	Output is correct
4	Correct	34 ms	2652 KB	Output is correct
5	Correct	24 ms	2648 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	275 ms	8796 KB	Output is correct
2	Correct	89 ms	16340 KB	Output is correct
3	Correct	101 ms	15988 KB	Output is correct
4	Correct	158 ms	18256 KB	Output is correct
5	Correct	131 ms	15700 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	92 ms	8824 KB	Output is correct
2	Correct	251 ms	8784 KB	Output is correct
3	Correct	94 ms	14420 KB	Output is correct
4	Correct	143 ms	18000 KB	Output is correct
5	Correct	125 ms	15984 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	336 ms	10832 KB	Output is correct
2	Correct	102 ms	20052 KB	Output is correct
3	Correct	93 ms	19536 KB	Output is correct
4	Correct	175 ms	22636 KB	Output is correct
5	Correct	156 ms	18744 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	103 ms	10836 KB	Output is correct
2	Correct	256 ms	10832 KB	Output is correct
3	Correct	120 ms	17652 KB	Output is correct
4	Correct	180 ms	22504 KB	Output is correct
5	Correct	157 ms	19536 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	411 ms	12880 KB	Output is correct
2	Correct	119 ms	23636 KB	Output is correct
3	Correct	108 ms	22868 KB	Output is correct
4	Correct	201 ms	26452 KB	Output is correct
5	Correct	169 ms	21960 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	169 ms	12880 KB	Output is correct
2	Correct	299 ms	12940 KB	Output is correct
3	Correct	141 ms	21076 KB	Output is correct
4	Correct	213 ms	26100 KB	Output is correct
5	Correct	177 ms	22900 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	442 ms	14932 KB	Output is correct
2	Correct	144 ms	27368 KB	Output is correct
3	Correct	115 ms	26448 KB	Output is correct
4	Correct	236 ms	30544 KB	Output is correct
5	Correct	209 ms	25936 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	143 ms	14972 KB	Output is correct
2	Correct	330 ms	14972 KB	Output is correct
3	Correct	167 ms	24400 KB	Output is correct
4	Correct	231 ms	30444 KB	Output is correct
5	Correct	220 ms	26448 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	564 ms	15956 KB	Output is correct
2	Correct	216 ms	31608 KB	Output is correct
3	Correct	165 ms	30548 KB	Output is correct
4	Correct	294 ms	35180 KB	Output is correct
5	Correct	249 ms	29520 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	247 ms	15956 KB	Output is correct
2	Correct	427 ms	16012 KB	Output is correct
3	Correct	210 ms	28144 KB	Output is correct
4	Correct	279 ms	35316 KB	Output is correct
5	Correct	258 ms	30804 KB	Output is correct

답안 #1057609

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