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Submission #684373

# Submission time Handle Problem Language Result Execution time Memory
684373 2023-01-21T05:03:11 Z handlename Mobile (BOI12_mobile) C++17
100 / 100
 819 ms 31724 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define float long double
const int MOD=1e9+7;
//const int MOD=998244353;
const int sqn=450;
const long double eps=1e-6;
long double n,l,x[1000002],y[1000002];
void runtc(){
	cin>>n>>l;
	for (int i=1;i<=n;i++){
		cin>>x[i]>>y[i];
	}
	long double mini=0,maxi=3e9;
	while (mini+eps<maxi){
		long double mid=(mini+maxi)/2;
		long double cur=0;
		for (int i=1;i<=n;i++){
			if (mid*mid<y[i]*y[i]) continue;
			long double lol=sqrt(mid*mid-y[i]*y[i]);
			if (x[i]-lol<=cur) cur=max(cur,x[i]+lol);
		}
		if (cur>=l) maxi=mid;
		else mini=mid;
	}
	cout<<fixed<<setprecision(4);
	cout<<maxi;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    //freopen("moocast.in","r",stdin);
    //freopen("moocast.out","w",stdout);
    //freopen("input1.in","r",stdin);
    //freopen("output1.out","w",stdout);
    //freopen("perfectly_balanced_chapter_1_input.txt","r",stdin);
    //freopen("hackercup_output.txt","w",stdout);
    int tc;
    //cin>>tc;
    tc=1;
    for (int i=1;i<=tc;i++){
        //cout<<"Case #"<<i<<": ";
        runtc();
    }
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 212 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory 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 3 ms 340 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 468 KB Output is correct
2 Correct 6 ms 504 KB Output is correct
3 Correct 6 ms 468 KB Output is correct
4 Correct 4 ms 388 KB Output is correct

Subtask #5
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 496 KB Output is correct
2 Correct 5 ms 468 KB Output is correct
3 Correct 4 ms 468 KB Output is correct
4 Correct 4 ms 512 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 468 KB Output is correct
2 Correct 7 ms 512 KB Output is correct
3 Correct 5 ms 468 KB Output is correct
4 Correct 4 ms 508 KB Output is correct
5 Correct 4 ms 504 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 2636 KB Output is correct
2 Correct 59 ms 2732 KB Output is correct
3 Correct 37 ms 2004 KB Output is correct
4 Correct 51 ms 2688 KB Output is correct
5 Correct 30 ms 1872 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 2772 KB Output is correct
2 Correct 64 ms 2512 KB Output is correct
3 Correct 54 ms 2892 KB Output is correct
4 Correct 53 ms 2688 KB Output is correct
5 Correct 72 ms 2984 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 3040 KB Output is correct
2 Correct 64 ms 2900 KB Output is correct
3 Correct 59 ms 2956 KB Output is correct
4 Correct 75 ms 3404 KB Output is correct
5 Correct 54 ms 3116 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 3412 KB Output is correct
2 Correct 89 ms 3360 KB Output is correct
3 Correct 71 ms 3404 KB Output is correct
4 Correct 77 ms 3364 KB Output is correct
5 Correct 72 ms 3404 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 86 ms 3468 KB Output is correct
2 Correct 83 ms 3388 KB Output is correct
3 Correct 70 ms 3412 KB Output is correct
4 Correct 73 ms 3460 KB Output is correct
5 Correct 67 ms 3432 KB Output is correct

Subtask #12
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 371 ms 16032 KB Output is correct
2 Correct 404 ms 15876 KB Output is correct
3 Correct 380 ms 16076 KB Output is correct
4 Correct 378 ms 16040 KB Output is correct
5 Correct 332 ms 15988 KB Output is correct

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 416 ms 15988 KB Output is correct
2 Correct 450 ms 15948 KB Output is correct
3 Correct 341 ms 15996 KB Output is correct
4 Correct 357 ms 15988 KB Output is correct
5 Correct 338 ms 15984 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 429 ms 19124 KB Output is correct
2 Correct 486 ms 19160 KB Output is correct
3 Correct 459 ms 19040 KB Output is correct
4 Correct 446 ms 19080 KB Output is correct
5 Correct 394 ms 19020 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 490 ms 19004 KB Output is correct
2 Correct 547 ms 19032 KB Output is correct
3 Correct 396 ms 19120 KB Output is correct
4 Correct 428 ms 19092 KB Output is correct
5 Correct 400 ms 19020 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 487 ms 22296 KB Output is correct
2 Correct 541 ms 22248 KB Output is correct
3 Correct 525 ms 22244 KB Output is correct
4 Correct 493 ms 22260 KB Output is correct
5 Correct 438 ms 22188 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 556 ms 22244 KB Output is correct
2 Correct 595 ms 22248 KB Output is correct
3 Correct 509 ms 22244 KB Output is correct
4 Correct 499 ms 22292 KB Output is correct
5 Correct 483 ms 22296 KB Output is correct

Subtask #18
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 553 ms 25376 KB Output is correct
2 Correct 625 ms 25436 KB Output is correct
3 Correct 605 ms 25324 KB Output is correct
4 Correct 576 ms 25384 KB Output is correct
5 Correct 518 ms 25268 KB Output is correct

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 639 ms 25380 KB Output is correct
2 Correct 662 ms 25380 KB Output is correct
3 Correct 534 ms 25368 KB Output is correct
4 Correct 567 ms 25396 KB Output is correct
5 Correct 520 ms 25428 KB Output is correct

Subtask #20
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 705 ms 31708 KB Output is correct
2 Correct 819 ms 31624 KB Output is correct
3 Correct 754 ms 31624 KB Output is correct
4 Correct 710 ms 31724 KB Output is correct
5 Correct 647 ms 31624 KB Output is correct

Subtask #21
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 782 ms 31532 KB Output is correct
2 Correct 817 ms 31692 KB Output is correct
3 Correct 685 ms 31564 KB Output is correct
4 Correct 710 ms 31564 KB Output is correct
5 Correct 652 ms 31624 KB Output is correct