oj.uz

답안 #67571

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
67571 2018-08-15T03:13:25 Z thebes Mobile (BOI12_mobile) C++14
0 / 100
 799 ms 70960 KB 
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,ssse3,sse3,sse4,popcnt,avx,mmx,abm,tune=native")
#include <bits/stdc++.h>
#define sq(x) ((x)*(x))
using namespace std;

const int MN = 1e6+6, MM = 1e9+7;
double lo, hi = MM, eps = 1e-6;
int N, M, i, j;
pair<int,int> pnt[MN];
inline bool check(double d){
	double mx = 0;
	for(int i=1;i<=N;i++){
		if(abs(pnt[i].second)>d) continue;
		double dx=sqrt(sq(d)-sq(pnt[i].second));
		if(pnt[i].first-dx<=mx) mx=max(mx,pnt[i].first+dx);
		else return 0;
	}
	return mx>=M; 
}

int main(){
	for(scanf("%d%d",&N,&M),i=1;i<=N;i++)
		scanf("%d%d",&pnt[i].first,&pnt[i].second);
	sort(pnt+1,pnt+N+1,[](pair<int,int>i,pair<int,int>j){return i.first<j.first;});
	while(lo+eps<hi){
		double m = (lo+hi)/2.0;
		if(check(m)) hi=m;
		else lo=m+eps;
	}
	printf("%.6lf\n",lo);
	return 0;
}

Compilation message

mobile.cpp: In function 'int main()':
mobile.cpp:24:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(scanf("%d%d",&N,&M),i=1;i<=N;i++)
      ~~~~~~~~~~~~~~~~~~~^~~~
mobile.cpp:25:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&pnt[i].first,&pnt[i].second);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 496 KB Output is correct
3 Incorrect 2 ms 496 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 496 KB Output is correct
2 Correct 3 ms 568 KB Output is correct
3 Correct 2 ms 572 KB Output is correct
4 Incorrect 2 ms 576 KB Output isn't correct

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 580 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 728 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 728 KB Output is correct
2 Correct 6 ms 768 KB Output is correct
3 Incorrect 6 ms 964 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 964 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 59 ms 2256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 46 ms 3048 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 72 ms 3820 KB Output is correct
2 Incorrect 56 ms 4980 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 64 ms 6536 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 91 ms 6584 KB Output is correct
2 Incorrect 72 ms 8164 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 395 ms 11288 KB Output is correct
2 Incorrect 308 ms 18924 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 270 ms 18924 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 499 ms 19712 KB Output is correct
2 Incorrect 362 ms 29056 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 318 ms 29056 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 616 ms 29832 KB Output is correct
2 Incorrect 468 ms 40704 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 499 ms 40768 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 638 ms 41420 KB Output is correct
2 Incorrect 601 ms 53856 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 454 ms 53864 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 785 ms 55528 KB Output is correct
2 Incorrect 799 ms 70888 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 514 ms 70960 KB Output isn't correct
2 Halted 0 ms 0 KB -