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답안 #466646

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
466646 2021-08-19T23:12:30 Z bill_lin Mobile (BOI12_mobile) C++14
0 / 100
 1000 ms 21132 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define pii pair<int, int>
#define pll pair<ll, ll>
using namespace std;
 
#define MOD 1000000007
#define INF 10000000

int n, l;

vector<pii> coords;

bool possible(ld curr) {
    ld right_bound = 0;
    for (int i = 0; i < n; i++) {
        ld left_most = coords[i].first - sqrt(curr * curr - (ld) coords[i].second * coords[i].second);
        if (left_most > right_bound) return true;
        right_bound = max(right_bound, coords[i].first + sqrt(curr * curr - (ld) coords[i].second * coords[i].second));
        
    }
    return right_bound < l;
}

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
//    freopen("multimoo.in", "r", stdin);
//    freopen("multimoo.out", "w", stdout);
    
    cin >> n >> l;
    
    coords.resize(n);
    for (int i = 0; i < n; i++) {
        int x, y;
        cin >> x >> y;
        coords[i] = {x, y};
    }
    
    ld l = 0, r = 1e9;
    for (int iteration = 0; iteration <= 50; iteration++) {
        ld mp = (l + r) / 2;
        if (possible(mp)) {
            l = mp;
        } else r = mp;
    }
    
    cout.precision(10);
    cout << l << '\n';
    
}

Subtask #1
0 / 4.0

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

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Incorrect 1 ms 204 KB Output isn't correct

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 400 KB Output is correct
2 Correct 3 ms 316 KB Output is correct
3 Incorrect 4 ms 320 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 114 ms 1612 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 148 ms 1560 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 52 ms 1604 KB Output is correct
2 Incorrect 36 ms 2108 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 40 ms 2620 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 59 ms 2508 KB Output is correct
2 Incorrect 46 ms 2508 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 286 ms 8388 KB Output is correct
2 Incorrect 215 ms 11272 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 173 ms 12408 KB Output is correct
2 Incorrect 783 ms 10820 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 353 ms 10180 KB Output is correct
2 Incorrect 253 ms 12160 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 232 ms 14788 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 400 ms 11788 KB Output is correct
2 Incorrect 296 ms 14036 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 273 ms 17300 KB Output is correct
2 Execution timed out 1077 ms 12908 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 456 ms 13464 KB Output is correct
2 Incorrect 361 ms 16452 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 298 ms 18084 KB Output is correct
2 Execution timed out 1043 ms 13752 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 568 ms 16704 KB Output is correct
2 Incorrect 471 ms 21132 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 356 ms 15860 KB Output is correct
2 Execution timed out 1091 ms 15172 KB Time limit exceeded
3 Halted 0 ms 0 KB -