oj.uz

답안 #906158

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
906158 2024-01-13T14:56:41 Z belgianbot Mobile (BOI12_mobile) C++14
20 / 100
 367 ms 10696 KB 
#include <bits/stdc++.h>
#define pow(x, y) (double)(pow(x, y))
using namespace std;

struct coord{
	int x, y;
};

vector <coord> a;
int N, L;
/*double dis(int ax, ay, double ans) {
	return (double)(sqrt(pow(ay, 2) + pow(ax - ans, 2)));
}
double distance(int i, int j) {
	long long num = pow(a[i].y, 2) - pow(a[j].y, 2) - pow(a[j].x, 2) + pow(a[i].x, 2);
	long long den = 2 * (-a[j].x + a[i].x);
	
	if (den == 0) return sqrt(num);
	double frac = (double)(num) / (double)(den);
	
	return frac;
}*/
bool solve(double mid) {
	double right(0);
	for (int i(0); i < a.size(); i++) {
		if (abs(a[i].y) > mid) continue;
		double iLeft = (double)(a[i].x) - (double)(sqrt(mid * mid - double(a[i].y * a[i].y)));
		double iRight = a[i].x + (a[i].x - iLeft);
		if (iLeft <= right) right = max(right,iRight);
	}
	return (right >= L);
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> N >> L;
	
	a.clear();
	int x, y; cin >> x >> y;
	a.push_back({x, y});
	for (int i(0); i < N - 1; i++) {
		int ax, ay;
		cin >> ax >> ay;
		if (ax == a[(int)(a.size() - 1)].x){
			if (abs(ay) < abs(a[(int)(a.size() - 1)].y)) {
				a[(int)(a.size() - 1)].y = ay;
			}
			else continue;
		}
		a.push_back({ax, ay});
	}
	double l(0), r(1e9);
	while (r - l > 0.0003) {
		double mid = l + (r - l) / 2;
		
		if (solve(mid)){
			 r = mid;
		 }
		else l = mid;
	}
	cout <<  setprecision(5) << fixed << l << '\n';
	return 0;
}

Compilation message

mobile.cpp: In function 'bool solve(double)':
mobile.cpp:25:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<coord>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for (int i(0); i < a.size(); i++) {
      |                 ~~^~~~~~~~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 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 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 344 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 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 #4
4.0 / 4.0

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

Subtask #5
4.0 / 4.0

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

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 2 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 1500 KB Output is correct
2 Incorrect 20 ms 992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 992 KB Output is correct
2 Correct 17 ms 992 KB Output is correct
3 Correct 19 ms 1500 KB Output is correct
4 Correct 24 ms 1500 KB Output is correct
5 Incorrect 25 ms 1496 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 1908 KB Output is correct
2 Incorrect 19 ms 988 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 992 KB Output is correct
2 Incorrect 23 ms 988 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 1496 KB Output is correct
2 Incorrect 24 ms 992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 131 ms 6344 KB Output is correct
2 Correct 65 ms 592 KB Output is correct
3 Correct 62 ms 596 KB Output is correct
4 Incorrect 121 ms 6340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 592 KB Output is correct
2 Correct 191 ms 6084 KB Output is correct
3 Incorrect 66 ms 1500 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 160 ms 9292 KB Output is correct
2 Correct 79 ms 548 KB Output is correct
3 Incorrect 76 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 81 ms 540 KB Output is correct
2 Correct 225 ms 10568 KB Output is correct
3 Incorrect 85 ms 1436 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 187 ms 9156 KB Output is correct
2 Correct 100 ms 488 KB Output is correct
3 Correct 86 ms 536 KB Output is correct
4 Incorrect 173 ms 10304 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 99 ms 344 KB Output is correct
2 Correct 253 ms 9856 KB Output is correct
3 Incorrect 100 ms 1488 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 217 ms 9660 KB Output is correct
2 Correct 107 ms 488 KB Output is correct
3 Correct 98 ms 476 KB Output is correct
4 Incorrect 190 ms 10696 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 118 ms 540 KB Output is correct
2 Correct 284 ms 10180 KB Output is correct
3 Incorrect 117 ms 1492 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 275 ms 9668 KB Output is correct
2 Correct 127 ms 484 KB Output is correct
3 Incorrect 123 ms 344 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 135 ms 468 KB Output is correct
2 Correct 367 ms 9152 KB Output is correct
3 Incorrect 132 ms 2568 KB Output isn't correct
4 Halted 0 ms 0 KB -