oj.uz

Submission #56115

# Submission time Handle Problem Language Result Execution time Memory
56115 2018-07-10T04:35:46 Z 강태규(#1579) Mobile (BOI12_mobile) C++11
0 / 100
 152 ms 1532 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <unordered_map>
#include <functional>
#include <cstring>
#include <cmath>
#include <ctime>
#include <cstdlib>

using namespace std;
typedef long long llong;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<llong, llong> pll;

int n, l;
int x[100000];
int y[100000];

ld sq(ld x) { return x * x; }

ld check(ld m) {
    ld ret = 1e19;
    for (int i = 0; i < n; ++i) {
        ret = min(ret, sq(x[i] - m) + sq(y[i]));
    }
    return ret;
}

int main() {
    scanf("%d%d", &n, &l);
    for (int i = 0; i < n; ++i) {
        scanf("%d%d", x + i, y + i);
    }
    ld s = 0, e = l, ans = 0;
    for (int i = 0; i < 100; ++i) {
        ld m1 = (s + s + e) / 3;
        ld m2 = (s + e + e) / 3;
        ld ret1 = check(m1);
        ld ret2 = check(m2);
        if (ret1 < ret2) s = m1, ans = max(ans, ret2);
        else e = m2, ans = max(ans, ret1);
    }
    cout.precision(20);
    cout << sqrt(ans) << '\n';
	return 0;
}

Compilation message

mobile.cpp: In function 'int main()':
mobile.cpp:36:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &l);
     ~~~~~^~~~~~~~~~~~~~~~
mobile.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", x + i, y + i);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 2 ms 484 KB Output is correct
3 Correct 3 ms 484 KB Output is correct
4 Incorrect 2 ms 484 KB Output isn't correct

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 484 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 520 KB Output is correct
2 Incorrect 6 ms 536 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 536 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 672 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 672 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 107 ms 1120 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 106 ms 1188 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 124 ms 1228 KB Output is correct
2 Correct 105 ms 1288 KB Output is correct
3 Correct 103 ms 1288 KB Output is correct
4 Incorrect 135 ms 1388 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 145 ms 1388 KB Output is correct
2 Correct 137 ms 1404 KB Output is correct
3 Correct 126 ms 1404 KB Output is correct
4 Incorrect 151 ms 1532 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 142 ms 1532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 152 ms 1532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 53 ms 1532 KB Time limit exceeded (wall clock)
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 125 ms 1532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 33 ms 1532 KB Time limit exceeded (wall clock)
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 120 ms 1532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 29 ms 1532 KB Time limit exceeded (wall clock)
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 132 ms 1532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 39 ms 1532 KB Time limit exceeded (wall clock)
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 127 ms 1532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 41 ms 1532 KB Time limit exceeded (wall clock)
2 Halted 0 ms 0 KB -