#include <iostream>
#include <vector>
#include <utility>
#include <algorithm>
#include <iomanip>
int main(){
int n;
std::cin >> n;
std::vector<double> a, b;
for(int i = 0; i < n; i++){
double x, y;
std::cin >> x >> y;
a.push_back(x - 1.0);
b.push_back(y - 1.0);
}
sort(a.rbegin(), a.rend());
sort(b.rbegin(), b.rend());
for(int i = 1; i < n; ++i) {
a[i] += a[i - 1];
b[i] += b[i - 1];
}
double ans = 0.0;
for(int i = 0; i < n; ++i) {
int lo = 0, hi = n - 1, best_j = -1;
while(lo <= hi) {
int j = (lo + hi) / 2;
if( a[i] - j - 1 <= b[j] - i - 1 ) {
hi = j - 1;
best_j = j;
} else {
lo = j + 1;
}
}
if(best_j != -1) {
ans = std::max(ans, std::min(a[i] - best_j - 1, b[best_j] - i - 1));
}
}
std::cout << std::fixed << std::setprecision(4) << ans << std::endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Incorrect |
0 ms |
296 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Incorrect |
0 ms |
296 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Incorrect |
0 ms |
296 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |