oj.uz

답안 #638433

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
638433 2022-09-06T00:39:40 Z LeticiaFCS Mobile (BOI12_mobile) C++17
100 / 100
 822 ms 30736 KB 
#include "bits/stdc++.h"
#define st first
#define nd second
using lint = int64_t;
constexpr int MOD = int(1e9) + 7;
constexpr int INF = 0x3f3f3f3f;
constexpr int NINF = 0xcfcfcfcf;
constexpr lint LINF = 0x3f3f3f3f3f3f3f3f;
const long double PI = acosl(-1.0);
// Returns -1 if a < b, 0 if a = b and 1 if a > b.
int cmp_double(double a, double b = 0, double eps = 1e-9) {
	return a + eps > b ? b + eps > a ? 0 : 1 : -1;
}
using namespace std;

using ld = double;

int main() {
	cin.tie(nullptr)->sync_with_stdio(false);
	int n;
	lint length;
	cin>>n>>length;
	vector<lint> x(n), y(n);
	for(int i=0; i<n; i++)
		cin>>x[i]>>y[i];
	
	ld l = 0, r = length;
	int it = 41;
	while(it--){
		ld mid = (l+r)/2;
		ld lastX = 0;
		for(int i=0; i<n; i++){
			ld xaux = sqrtl(mid*mid - y[i]*y[i]);
			ld a = x[i] - xaux;
			ld b = x[i] + xaux;
			if(a <= lastX + 1e-9)
				lastX = max(lastX, b);
		}
				
		if(length <= lastX + 1e-9) r = mid;
		else l = mid;
	}
	cout<<fixed<<setprecision(5)<<r<<"\n";
	

	return 0;
}
/*
[  ]Leu o problema certo???
[  ]Ver se precisa de long long
[  ]Viu o limite dos fors (é n? é m?)
[  ]Tamanho do vetor, será que é 2e5 em vez de 1e5??
[  ]Testar sample
[  ]Testar casos de  borda
[  ]1LL no 1LL << i
[  ]Testar mod (é 1e9+7, mesmo?, será que o mod não ficou negativo?)
*/

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 320 KB Output is correct
4 Correct 0 ms 316 KB Output is correct

Subtask #3
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 348 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 444 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 7 ms 468 KB Output is correct

Subtask #5
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 340 KB Output is correct
2 Correct 4 ms 468 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 5 ms 472 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 324 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 4 ms 488 KB Output is correct
5 Correct 5 ms 340 KB Output is correct

Subtask #7
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 55 ms 2160 KB Output is correct
2 Correct 27 ms 2164 KB Output is correct
3 Correct 24 ms 1748 KB Output is correct
4 Correct 61 ms 2132 KB Output is correct
5 Correct 37 ms 1492 KB Output is correct

Subtask #8
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 58 ms 2180 KB Output is correct
2 Correct 56 ms 2064 KB Output is correct
3 Correct 62 ms 2228 KB Output is correct
4 Correct 73 ms 2208 KB Output is correct
5 Correct 69 ms 2316 KB Output is correct

Subtask #9
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 2332 KB Output is correct
2 Correct 28 ms 2140 KB Output is correct
3 Correct 36 ms 2260 KB Output is correct
4 Correct 81 ms 2444 KB Output is correct
5 Correct 74 ms 2364 KB Output is correct

Subtask #10
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 2772 KB Output is correct
2 Correct 34 ms 2516 KB Output is correct
3 Correct 44 ms 2516 KB Output is correct
4 Correct 85 ms 2528 KB Output is correct
5 Correct 79 ms 2636 KB Output is correct

Subtask #11
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 2772 KB Output is correct
2 Correct 41 ms 2424 KB Output is correct
3 Correct 44 ms 2508 KB Output is correct
4 Correct 83 ms 2516 KB Output is correct
5 Correct 76 ms 2516 KB Output is correct

Subtask #12
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 151 ms 9044 KB Output is correct
2 Correct 175 ms 8792 KB Output is correct
3 Correct 166 ms 8712 KB Output is correct
4 Correct 393 ms 8788 KB Output is correct
5 Correct 377 ms 8652 KB Output is correct

Subtask #13
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 174 ms 9040 KB Output is correct
2 Correct 361 ms 8836 KB Output is correct
3 Correct 218 ms 8532 KB Output is correct
4 Correct 401 ms 8532 KB Output is correct
5 Correct 383 ms 8532 KB Output is correct

Subtask #14
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 184 ms 10700 KB Output is correct
2 Correct 209 ms 10344 KB Output is correct
3 Correct 200 ms 10344 KB Output is correct
4 Correct 485 ms 10436 KB Output is correct
5 Correct 454 ms 10092 KB Output is correct

Subtask #15
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 209 ms 10604 KB Output is correct
2 Correct 425 ms 10316 KB Output is correct
3 Correct 267 ms 10096 KB Output is correct
4 Correct 470 ms 10068 KB Output is correct
5 Correct 460 ms 10092 KB Output is correct

Subtask #16
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 220 ms 12168 KB Output is correct
2 Correct 238 ms 11792 KB Output is correct
3 Correct 230 ms 11860 KB Output is correct
4 Correct 557 ms 11788 KB Output is correct
5 Correct 526 ms 11724 KB Output is correct

Subtask #17
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 241 ms 12172 KB Output is correct
2 Correct 490 ms 11848 KB Output is correct
3 Correct 301 ms 11664 KB Output is correct
4 Correct 565 ms 11604 KB Output is correct
5 Correct 565 ms 11660 KB Output is correct

Subtask #18
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 233 ms 13644 KB Output is correct
2 Correct 284 ms 13268 KB Output is correct
3 Correct 269 ms 13348 KB Output is correct
4 Correct 637 ms 13352 KB Output is correct
5 Correct 602 ms 13260 KB Output is correct

Subtask #19
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 276 ms 13652 KB Output is correct
2 Correct 593 ms 13352 KB Output is correct
3 Correct 346 ms 13140 KB Output is correct
4 Correct 645 ms 13092 KB Output is correct
5 Correct 614 ms 13132 KB Output is correct

Subtask #20
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 316 ms 16480 KB Output is correct
2 Correct 340 ms 16224 KB Output is correct
3 Correct 333 ms 16224 KB Output is correct
4 Correct 802 ms 15992 KB Output is correct
5 Correct 786 ms 29660 KB Output is correct

Subtask #21
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 340 ms 15956 KB Output is correct
2 Correct 706 ms 15980 KB Output is correct
3 Correct 456 ms 16112 KB Output is correct
4 Correct 822 ms 16076 KB Output is correct
5 Correct 785 ms 30736 KB Output is correct