이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n; cin>>n;
int l[n], r[n];
deque<int> dq;
for (int i = 0; i < n; i++)
cin>>l[i]>>r[i];
int ans = 0, pos = -1;
for (int i = 0; i < n; i++) {
while (dq.size() && l[i] >= l[dq.back()]) dq.pop_back();
dq.push_back(i);
while (dq.size() && l[dq[0]] > r[i]) {
pos = dq.front();
dq.pop_front();
}
ans = max(ans, i-pos);
}
cout << ans << endl;
return 0;
}
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