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Submission #319679

# Submission time Handle Problem Language Result Execution time Memory
319679 2020-11-06T06:36:12 Z dolphingarlic Mobile (BOI12_mobile) C++14
100 / 100
 538 ms 16240 KB 
#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
#define x first
#define y second
using namespace std;
 
pair<long long, long long> p[1000000];
 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, len;
    cin >> n >> len;
    FOR(i, 0, n) cin >> p[i].x >> p[i].y;
 
    double l = 1, r = 1.5e9;
    while (r - l > 1e-3) {
        double mid = (l + r) / 2, curr = 0;
        FOR(i, 0, n) {
            double delta = sqrt(mid * mid - p[i].y * p[i].y);
            double a = p[i].x - delta, b = p[i].x + delta;
            if (a <= curr) curr = max(curr, b);
        }
 
        if (curr >= len) r = mid;
        else l = mid;
    }
 
    cout << fixed << setprecision(4) << l;
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 364 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 2 ms 364 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 364 KB Output is correct
2 Correct 3 ms 364 KB Output is correct
3 Correct 3 ms 364 KB Output is correct
4 Correct 3 ms 364 KB Output is correct

Subtask #5
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 492 KB Output is correct
2 Correct 3 ms 364 KB Output is correct
3 Correct 2 ms 364 KB Output is correct
4 Correct 3 ms 364 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 364 KB Output is correct
2 Correct 3 ms 492 KB Output is correct
3 Correct 2 ms 364 KB Output is correct
4 Correct 3 ms 364 KB Output is correct
5 Correct 3 ms 364 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 1516 KB Output is correct
2 Correct 30 ms 1644 KB Output is correct
3 Correct 21 ms 1132 KB Output is correct
4 Correct 39 ms 1576 KB Output is correct
5 Correct 20 ms 1132 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 1516 KB Output is correct
2 Correct 33 ms 1388 KB Output is correct
3 Correct 38 ms 1644 KB Output is correct
4 Correct 40 ms 1516 KB Output is correct
5 Correct 46 ms 1644 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 1772 KB Output is correct
2 Correct 32 ms 1644 KB Output is correct
3 Correct 33 ms 1772 KB Output is correct
4 Correct 54 ms 1900 KB Output is correct
5 Correct 41 ms 1772 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 1900 KB Output is correct
2 Correct 40 ms 1900 KB Output is correct
3 Correct 39 ms 1900 KB Output is correct
4 Correct 54 ms 1892 KB Output is correct
5 Correct 47 ms 1900 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 1900 KB Output is correct
2 Correct 39 ms 1900 KB Output is correct
3 Correct 39 ms 1888 KB Output is correct
4 Correct 54 ms 1900 KB Output is correct
5 Correct 47 ms 1900 KB Output is correct

Subtask #12
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 180 ms 8292 KB Output is correct
2 Correct 199 ms 8164 KB Output is correct
3 Correct 197 ms 8420 KB Output is correct
4 Correct 269 ms 8164 KB Output is correct
5 Correct 240 ms 8164 KB Output is correct

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 203 ms 8292 KB Output is correct
2 Correct 272 ms 8184 KB Output is correct
3 Correct 195 ms 8164 KB Output is correct
4 Correct 268 ms 8164 KB Output is correct
5 Correct 245 ms 8164 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 213 ms 9700 KB Output is correct
2 Correct 239 ms 9700 KB Output is correct
3 Correct 239 ms 9892 KB Output is correct
4 Correct 326 ms 9836 KB Output is correct
5 Correct 288 ms 9700 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 247 ms 9956 KB Output is correct
2 Correct 328 ms 9828 KB Output is correct
3 Correct 234 ms 9828 KB Output is correct
4 Correct 329 ms 9792 KB Output is correct
5 Correct 299 ms 9800 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 250 ms 11364 KB Output is correct
2 Correct 287 ms 11236 KB Output is correct
3 Correct 279 ms 11364 KB Output is correct
4 Correct 379 ms 11368 KB Output is correct
5 Correct 335 ms 11496 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 285 ms 11364 KB Output is correct
2 Correct 373 ms 11236 KB Output is correct
3 Correct 282 ms 11236 KB Output is correct
4 Correct 377 ms 11436 KB Output is correct
5 Correct 343 ms 11488 KB Output is correct

Subtask #18
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 289 ms 12900 KB Output is correct
2 Correct 320 ms 12900 KB Output is correct
3 Correct 313 ms 12900 KB Output is correct
4 Correct 432 ms 13032 KB Output is correct
5 Correct 390 ms 13032 KB Output is correct

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 326 ms 13028 KB Output is correct
2 Correct 423 ms 12900 KB Output is correct
3 Correct 321 ms 12900 KB Output is correct
4 Correct 432 ms 13028 KB Output is correct
5 Correct 386 ms 12904 KB Output is correct

Subtask #20
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 357 ms 16240 KB Output is correct
2 Correct 407 ms 16132 KB Output is correct
3 Correct 396 ms 16100 KB Output is correct
4 Correct 538 ms 16100 KB Output is correct
5 Correct 478 ms 15972 KB Output is correct

Subtask #21
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 403 ms 15972 KB Output is correct
2 Correct 522 ms 15972 KB Output is correct
3 Correct 410 ms 16228 KB Output is correct
4 Correct 537 ms 16100 KB Output is correct
5 Correct 492 ms 15972 KB Output is correct