#include <bits/stdc++.h>
//#define int long long
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define sc second
#define endl "\n"
#define pii pair<int,int>
using namespace std;
const int MAXN = 1e6+5;
const int mod7 = 1e9+7;
const long long inf = 1e18;
vector<vector<int>> closest(MAXN);
vector<int> nxt(MAXN,-1);
vector<int> niz;
signed main()
{
ios_base::sync_with_stdio(false),cin.tie(0), cout.tie(0);
int tt=1;
//cin >> tt;
while(tt--)
{
int n;
cin >> n;
niz.resize(n);
for(int i=0; i<n; i++)
{
cin >> niz[i];
closest[niz[i]].push_back(i);
if(!closest[niz[i]+1].empty())
{
nxt[closest[niz[i]+1].back()] = i;
closest[niz[i]+1].pop_back();
}
}
int rez = 0;
for(int i=0; i<n; i++)
{
if(nxt[i] == -2)continue;
int br = i;
while(br !=-1)
{
int pre = br;
br = nxt[br];
nxt[pre] = -2;
}
rez++;
}
cout << rez<< endl;
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
27740 KB |
Output is correct |
2 |
Correct |
5 ms |
27740 KB |
Output is correct |
3 |
Correct |
6 ms |
27740 KB |
Output is correct |
4 |
Correct |
8 ms |
27740 KB |
Output is correct |
5 |
Correct |
59 ms |
31060 KB |
Output is correct |
6 |
Correct |
52 ms |
31324 KB |
Output is correct |
7 |
Correct |
42 ms |
30812 KB |
Output is correct |
8 |
Correct |
44 ms |
30556 KB |
Output is correct |
9 |
Correct |
48 ms |
30808 KB |
Output is correct |
10 |
Correct |
52 ms |
31064 KB |
Output is correct |