#include <bits/stdc++.h>
using namespace std;
#define nl '\n'
using ll = long long;
int main() {
cin.tie(0)->sync_with_stdio(0);
int N; cin >> N;
vector<array<int, 2>> A(N);
for(auto& x : A) {
cin >> x[0] >> x[1];
}
set<int> S; for(int i = 0; i < N; i++) S.insert(i);
vector<int> IDX; for(int i = 0; i < N; i++) IDX.push_back(i);
for(int t = 0; t < 2; t++) {
sort(begin(IDX), end(IDX), [&](int x, int y) {
if (A[x] == A[y]) return x < y;
return A[x] < A[y];
});
vector<int> stk = {-1};
for(auto i : IDX) {
while(stk.back() != -1 && (A[stk.back()][1] - A[stk.back()][0]) <= (A[i][1] - A[i][0])) {
stk.pop_back();
}
stk.push_back(i);
}
set<int> NS;
for(auto x : stk) {
// cout << x << " ";
if (S.count(x)) NS.insert(x);
}
// cout << nl;
S.swap(NS);
for(auto& x : A) x[0] = -x[0];
}
cout << size(S) << nl;
return 0;
}
/*
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
316 KB |
Output is correct |
| 2 |
Correct |
225 ms |
15716 KB |
Output is correct |
| 3 |
Correct |
196 ms |
18076 KB |
Output is correct |
| 4 |
Correct |
351 ms |
32180 KB |
Output is correct |
| 5 |
Correct |
168 ms |
26656 KB |
Output is correct |
| 6 |
Correct |
1534 ms |
61988 KB |
Output is correct |
| 7 |
Correct |
672 ms |
50544 KB |
Output is correct |
| 8 |
Correct |
355 ms |
39644 KB |
Output is correct |
| 9 |
Correct |
258 ms |
39632 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
232 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
316 KB |
Output is correct |
| 4 |
Correct |
1 ms |
320 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
324 KB |
Output is correct |
| 8 |
Correct |
1 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
324 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
0 ms |
320 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
324 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
232 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
316 KB |
Output is correct |
| 4 |
Correct |
1 ms |
320 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
324 KB |
Output is correct |
| 8 |
Correct |
1 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
324 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
0 ms |
320 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
324 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
1 ms |
332 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
352 KB |
Output is correct |
| 26 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
316 KB |
Output is correct |
| 2 |
Correct |
225 ms |
15716 KB |
Output is correct |
| 3 |
Correct |
196 ms |
18076 KB |
Output is correct |
| 4 |
Correct |
351 ms |
32180 KB |
Output is correct |
| 5 |
Correct |
168 ms |
26656 KB |
Output is correct |
| 6 |
Correct |
1534 ms |
61988 KB |
Output is correct |
| 7 |
Correct |
672 ms |
50544 KB |
Output is correct |
| 8 |
Correct |
355 ms |
39644 KB |
Output is correct |
| 9 |
Correct |
258 ms |
39632 KB |
Output is correct |
| 10 |
Correct |
1 ms |
232 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
316 KB |
Output is correct |
| 13 |
Correct |
1 ms |
320 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
324 KB |
Output is correct |
| 17 |
Correct |
1 ms |
320 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
0 ms |
324 KB |
Output is correct |
| 20 |
Correct |
1 ms |
324 KB |
Output is correct |
| 21 |
Correct |
0 ms |
320 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
1 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
212 KB |
Output is correct |
| 25 |
Correct |
1 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
212 KB |
Output is correct |
| 27 |
Correct |
1 ms |
324 KB |
Output is correct |
| 28 |
Correct |
1 ms |
340 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
1 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| 33 |
Correct |
1 ms |
340 KB |
Output is correct |
| 34 |
Correct |
1 ms |
352 KB |
Output is correct |
| 35 |
Correct |
1 ms |
340 KB |
Output is correct |
| 36 |
Correct |
207 ms |
26964 KB |
Output is correct |
| 37 |
Correct |
283 ms |
33796 KB |
Output is correct |
| 38 |
Correct |
331 ms |
39460 KB |
Output is correct |
| 39 |
Correct |
340 ms |
36416 KB |
Output is correct |
| 40 |
Correct |
341 ms |
39468 KB |
Output is correct |
| 41 |
Correct |
348 ms |
39440 KB |
Output is correct |
| 42 |
Correct |
360 ms |
39524 KB |
Output is correct |
| 43 |
Correct |
799 ms |
53580 KB |
Output is correct |
| 44 |
Correct |
1020 ms |
57564 KB |
Output is correct |
| 45 |
Correct |
1875 ms |
60348 KB |
Output is correct |
