#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const int MOD = (int)1e9 + 7;
const int MAXN = (int)1e6 + 3;
const int infint = (int)1e9;
const ll inf = (ll)1e18;
vector<int> pos[MAXN];
int n;
int main()
{
ios::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
cin >> n;
int mx = 0;
for (int i = 0; i < n; i++)
{
int a;
cin >> a;
pos[a].push_back(i);
mx = max(mx, a);
}
int ted = 0;
set<int> S;
for (int i = mx; i >= 1; i--)
{
for (auto u : pos[i])
{
if(S.empty() || *S.begin() > u)
ted++;
else
S.erase(*S.begin());
}
S.clear();
for (auto u : pos[i])
S.insert(u);
}
cout << ted;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
22 ms |
23800 KB |
Output is correct |
2 |
Correct |
23 ms |
23940 KB |
Output is correct |
3 |
Correct |
24 ms |
23980 KB |
Output is correct |
4 |
Correct |
24 ms |
24060 KB |
Output is correct |
5 |
Correct |
199 ms |
32260 KB |
Output is correct |
6 |
Correct |
213 ms |
35736 KB |
Output is correct |
7 |
Correct |
171 ms |
39192 KB |
Output is correct |
8 |
Correct |
171 ms |
40424 KB |
Output is correct |
9 |
Correct |
185 ms |
45280 KB |
Output is correct |
10 |
Correct |
188 ms |
47740 KB |
Output is correct |