#include <bits/stdc++.h>
const int32_t MAX_N = 1e6;
const double EPS = 1e-6;
int32_t n, l;
std::pair< int32_t, int32_t > points[MAX_N + 5];
bool Check(long double r) {
std::vector< std::pair< long double, bool > > events(2 * n);
for(int32_t i = 0; i < n; i++) {
if(r * r < (int64_t) points[i].second * points[i].second) {
events[2 * i] = { -2.0, 0 };
events[2 * i + 1] = { -1.0, 1 };
continue;
}
long double x1 = points[i].first - sqrt(r * r - (int64_t) points[i].second * points[i].second);
long double x2 = points[i].first + sqrt(r * r - (int64_t) points[i].second * points[i].second);
events[2 * i] = { x1, 0 };
events[2 * i + 1] = { x2, 1 };
}
std::sort(events.begin(), events.end());
if(r == 5.0) {
for(int32_t i = 0; i < 2 * n; i++) {
std::cout << " " << events[i].first << " " << events[i].second << '\n';
}
}
int32_t currCnt = 0;
for(int32_t i = 0; i < 2 * n; i++) {
if(events[i].first > 0 && currCnt == 0) {
return false;
}
if(events[i].first > l) {
break;
}
if(events[i].second == 0) {
currCnt++;
}
else {
currCnt--;
}
if(!(events[i].first < 0.0) && currCnt == 0) {
return false;
}
}
return true;
}
int main() {
std::ios_base::sync_with_stdio(false);
std::cin.tie(nullptr);
std::cin >> n >> l;
for(int32_t i = 0; i < n; i++) {
std::cin >> points[i].first >> points[i].second;
}
int64_t low = 1, high = 1e12;
long double ans;
while(low <= high) {
int64_t mid = (low + high) / 2;
if(Check(mid / 10000.0)) {
ans = mid / 10000.0;
high = mid - 1;
}
else {
low = mid + 1;
}
}
std::cout << std::fixed << std::setprecision(7);
std::cout << ans << '\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
376 KB |
Output is correct |
2 |
Correct |
2 ms |
640 KB |
Output is correct |
3 |
Correct |
2 ms |
704 KB |
Output is correct |
4 |
Correct |
2 ms |
704 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
704 KB |
Output is correct |
2 |
Correct |
3 ms |
704 KB |
Output is correct |
3 |
Correct |
3 ms |
836 KB |
Output is correct |
4 |
Correct |
3 ms |
836 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
23 ms |
1076 KB |
Output is correct |
2 |
Incorrect |
19 ms |
1128 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
41 ms |
1252 KB |
Output is correct |
2 |
Correct |
40 ms |
1352 KB |
Output is correct |
3 |
Correct |
42 ms |
1380 KB |
Output is correct |
4 |
Correct |
40 ms |
1496 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
42 ms |
1512 KB |
Output is correct |
2 |
Correct |
41 ms |
1616 KB |
Output is correct |
3 |
Correct |
44 ms |
1656 KB |
Output is correct |
4 |
Correct |
40 ms |
1668 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
42 ms |
1744 KB |
Output is correct |
2 |
Correct |
41 ms |
1792 KB |
Output is correct |
3 |
Correct |
43 ms |
1792 KB |
Output is correct |
4 |
Correct |
41 ms |
1860 KB |
Output is correct |
5 |
Correct |
41 ms |
2008 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
638 ms |
7644 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
763 ms |
7936 KB |
Output is correct |
2 |
Correct |
691 ms |
8228 KB |
Output is correct |
3 |
Correct |
797 ms |
10024 KB |
Output is correct |
4 |
Correct |
736 ms |
11204 KB |
Output is correct |
5 |
Correct |
789 ms |
13116 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
943 ms |
13172 KB |
Output is correct |
2 |
Correct |
925 ms |
13172 KB |
Output is correct |
3 |
Correct |
868 ms |
13172 KB |
Output is correct |
4 |
Correct |
888 ms |
15920 KB |
Output is correct |
5 |
Correct |
874 ms |
16112 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1032 ms |
16864 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
763 ms |
16900 KB |
Output is correct |
2 |
Execution timed out |
1075 ms |
16900 KB |
Time limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1068 ms |
45096 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1080 ms |
45096 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1084 ms |
52304 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1081 ms |
52304 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1056 ms |
61016 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1069 ms |
61016 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1063 ms |
67852 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1057 ms |
67952 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1070 ms |
81936 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1054 ms |
81992 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |