#include <bits/stdc++.h>
#define int long long
#define pi pair <int, int>
#define ppi pair <pi, int>
#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define debug(x) cout << #x << ": " << x << '\n'
using namespace std;
const int inf = 1000000000;
int n, a[1000005], prefmax[1000005], prefmin[1000005];
set <int> s;
signed main(){
ios::sync_with_stdio(0), cin.tie(0);
cin >> n;
prefmin[0] = inf;
for(int i = 1; i <= n; i++){
cin >> a[i];
prefmax[i] = max(prefmax[i-1], a[i]);
prefmin[i] = min(prefmin[i-1], a[i]);
}
s.insert(a[1]);
int ans = 1, l = 2;
while(a[l] >= a[l-1]){
s.insert(a[l]);
l++;
}
//for(int i = 1; i < l; i++) cout << a[i] << ' ';
int i = l, sz = 1, tmpmin = inf, tmpmax = 0;
while(i <= n){
//debug(i);
tmpmin = min(tmpmin, a[i]), tmpmax = max(tmpmax, a[i]);
if(sz != 1){
if(a[i] < a[i-1] or (s.upper_bound(tmpmin) != s.lower_bound(tmpmax))){
ans++, sz = 1;
for(int j = l; j < i; j++) s.insert(a[j]);
l = i;
tmpmin = a[i], tmpmax = a[i];
}
else sz++;
}
else sz++;
i++;
}
ans++;
cout << ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
