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답안 #1010128

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1010128 2024-06-28T10:54:16 Z Psiuk_Yurii Mobile (BOI12_mobile) C++14
100 / 100
 474 ms 50852 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
typedef pair<ld,ld> pld;
typedef pair<ll,pll> ppl;

ll n;
ld u,L,R,eps;
pld p[1000009];

bool can(ld R){
   ld r=0.0;
   for(int i=1;i<=n;i++){
       if(R>=p[i].second){
           ld x0=p[i].first-sqrt(R*R-p[i].second*p[i].second);
           if(x0<=r) {
                ld x1=p[i].first+sqrt(R*R-p[i].second*p[i].second);
                r=max(x1,r);
                if(r>=u) return true;
           }
       }
   }
  return false;
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>u;
    for(int i=1;i<=n;i++) {cin>>p[i].first>>p[i].second; p[i].second=abs(p[i].second);}
    eps=0.001;
    L=0.0; R=1000000000.0;
    while(L<R-eps){
        ld mid=(L+R)*0.5;
        if(can(mid)) R=mid;
        else L=mid;
    }
    cout<<fixed<<setprecision(5)<<L;


    return 0;
}

Subtask #1
4.0 / 4.0

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

Subtask #2
4.0 / 4.0

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

Subtask #3
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 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 604 KB Output is correct
2 Correct 4 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 3 ms 600 KB Output is correct

Subtask #5
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 2 ms 600 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 3 ms 604 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 604 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 2 ms 608 KB Output is correct
4 Correct 2 ms 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct

Subtask #7
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 36 ms 2652 KB Output is correct
2 Correct 28 ms 2648 KB Output is correct
3 Correct 16 ms 2140 KB Output is correct
4 Correct 27 ms 2588 KB Output is correct
5 Correct 14 ms 1964 KB Output is correct

Subtask #8
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 2900 KB Output is correct
2 Correct 22 ms 2648 KB Output is correct
3 Correct 26 ms 2908 KB Output is correct
4 Correct 28 ms 2896 KB Output is correct
5 Correct 32 ms 3164 KB Output is correct

Subtask #9
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 38 ms 3160 KB Output is correct
2 Correct 28 ms 2904 KB Output is correct
3 Correct 28 ms 2944 KB Output is correct
4 Correct 55 ms 3340 KB Output is correct
5 Correct 37 ms 3156 KB Output is correct

Subtask #10
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 46 ms 3416 KB Output is correct
2 Correct 36 ms 3420 KB Output is correct
3 Correct 33 ms 3416 KB Output is correct
4 Correct 45 ms 3664 KB Output is correct
5 Correct 35 ms 3412 KB Output is correct

Subtask #11
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 52 ms 3420 KB Output is correct
2 Correct 36 ms 3524 KB Output is correct
3 Correct 31 ms 3416 KB Output is correct
4 Correct 40 ms 3412 KB Output is correct
5 Correct 32 ms 3468 KB Output is correct

Subtask #12
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 247 ms 15956 KB Output is correct
2 Correct 192 ms 15956 KB Output is correct
3 Correct 168 ms 16256 KB Output is correct
4 Correct 189 ms 15952 KB Output is correct
5 Correct 167 ms 16060 KB Output is correct

Subtask #13
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 218 ms 16116 KB Output is correct
2 Correct 254 ms 15956 KB Output is correct
3 Correct 162 ms 15948 KB Output is correct
4 Correct 195 ms 16056 KB Output is correct
5 Correct 181 ms 15956 KB Output is correct

Subtask #14
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 306 ms 19028 KB Output is correct
2 Correct 221 ms 19228 KB Output is correct
3 Correct 189 ms 19028 KB Output is correct
4 Correct 241 ms 19032 KB Output is correct
5 Correct 213 ms 19124 KB Output is correct

Subtask #15
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 246 ms 19216 KB Output is correct
2 Correct 256 ms 18992 KB Output is correct
3 Correct 179 ms 19120 KB Output is correct
4 Correct 223 ms 19108 KB Output is correct
5 Correct 182 ms 19024 KB Output is correct

Subtask #16
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 328 ms 22212 KB Output is correct
2 Correct 246 ms 32980 KB Output is correct
3 Correct 227 ms 32336 KB Output is correct
4 Correct 245 ms 35664 KB Output is correct
5 Correct 198 ms 31316 KB Output is correct

Subtask #17
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 260 ms 22352 KB Output is correct
2 Correct 302 ms 22348 KB Output is correct
3 Correct 211 ms 22380 KB Output is correct
4 Correct 240 ms 22224 KB Output is correct
5 Correct 228 ms 22352 KB Output is correct

Subtask #18
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 365 ms 25424 KB Output is correct
2 Correct 279 ms 37716 KB Output is correct
3 Correct 250 ms 37096 KB Output is correct
4 Correct 298 ms 41040 KB Output is correct
5 Correct 239 ms 36652 KB Output is correct

Subtask #19
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 284 ms 25428 KB Output is correct
2 Correct 328 ms 25296 KB Output is correct
3 Correct 263 ms 25424 KB Output is correct
4 Correct 277 ms 25400 KB Output is correct
5 Correct 270 ms 25428 KB Output is correct

Subtask #20
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 474 ms 31568 KB Output is correct
2 Correct 336 ms 47184 KB Output is correct
3 Correct 333 ms 46092 KB Output is correct
4 Correct 418 ms 50852 KB Output is correct
5 Correct 307 ms 45140 KB Output is correct

Subtask #21
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 397 ms 31720 KB Output is correct
2 Correct 405 ms 31824 KB Output is correct
3 Correct 314 ms 31576 KB Output is correct
4 Correct 378 ms 31572 KB Output is correct
5 Correct 340 ms 31572 KB Output is correct