#include <bits/stdc++.h>
using namespace std;
const int mxN = 1e6 + 123;
int A[mxN], B[mxN], R[mxN];
int main() {
ios_base :: sync_with_stdio(false); cin.tie(nullptr);
int N; cin >> N;
for (int i = 1; i <= N; ++i) cin >> A[i];
R[N] = N;
for (int i = N - 1; i > 0; i--) {
if (A[i] <= A[i + 1]) R[i] = R[i + 1];
else R[i] = i;
}
set <int> st;
int ans = 0;
for (int i = 1; i <= N; ++i) {
++ans;
if (i == 1) {
for (int j = i; j <= R[i]; ++j) st.insert(A[j]);
i = R[i];
continue;
}
if (A[i] >= *(--st.end())) {
for (int j = i; j <= R[i]; ++j) st.insert(A[j]);
i = R[i];
continue;
}int lb = i, rb = R[i], j = i;
int l = *st.upper_bound(A[i]);
int nxt = l;
if (st.upper_bound(l) != st.end()) l = *st.upper_bound(l);
int mn = *st.begin();
while (rb >= lb) {
int md = (lb + rb) / 2;
// can or not
if (A[md] <= mn) {
j = md;
lb = md + 1;
continue;
}
if (nxt == l || (nxt != l && A[md] < nxt)) {
j = md;
lb = md + 1;
}else rb = md - 1;
}
for (int k = i; k <= j; ++k) st.insert(A[k]);
i = j;
}
cout << ans;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |