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답안 #920884

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
920884 2024-02-03T07:17:54 Z Kams7 Mobile (BOI12_mobile) C++17
8 / 100
 753 ms 99496 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long

double dist(double k, ll x, ll y){
    if (k<y) return -1;
    return sqrt(k*k - y*y);
}

bool check(ll n, double k, ll l, vector<pair<ll,ll>> v){
    double mn = 0;
    for (ll i=0; i<n; i++){
        ll x = v[i].first, y = v[i].second;
        double d = dist(k, x, y);
        if (d==-1) continue;
        if (x-d<=mn) mn = max(mn, x+d);
    }
    return mn>=l;
}

void solve(){
    ll n, len; cin >> n >> len;
    map<ll, ll> ys; 
    for (ll i=0; i<n; i++){
        ll x, y; cin >> x >> y;
        if (ys.find(x) == ys.end()) ys[x] = abs(y);
        else ys[x] = min(ys[x], abs(y));
    }
    vector<pair<ll, ll>> v;
    for (auto el: ys){
        v.push_back(make_pair(el.first, el.second));
    }
    sort(v.begin(), v.end());
    n = size(v);
    ll l=0, r=2*100000000000000;
    while (l<r){
        ll mid = ((l+r)/2);
        if (check(n, mid/10000.0, len, v)) r=mid;
        else l=mid+1;
    }
    cout << l/10000.0 << "\n";
}


int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(NULL);
	// your code goes here
	// int t;
	// cin >> t;
	// while (t--) 
    solve();
}

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 344 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 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Incorrect 2 ms 720 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 604 KB Output is correct
2 Incorrect 3 ms 860 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 604 KB Output is correct
2 Incorrect 3 ms 860 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 856 KB Output is correct
2 Incorrect 3 ms 860 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 46 ms 7632 KB Output is correct
2 Incorrect 41 ms 6600 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 1364 KB Output is correct
2 Correct 30 ms 4552 KB Output is correct
3 Incorrect 48 ms 7900 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 51 ms 9160 KB Output is correct
2 Incorrect 40 ms 6232 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 44 ms 5416 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 64 ms 10792 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 335 ms 49692 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 137 ms 5712 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 406 ms 60152 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 165 ms 6036 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 485 ms 70792 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 187 ms 6924 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 577 ms 80792 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 204 ms 7828 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 753 ms 99496 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 248 ms 9332 KB Output isn't correct
2 Halted 0 ms 0 KB -