#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
#define tiii tuple<int,int,int>
const int mxn = 1e6+10;
pii arr[mxn];
int n;
int bit[mxn];
vector<int> all;
int cnt[mxn];
void modify(int p,int val){
for(;p<mxn;p+=p&-p)bit[p] += val;
return;
}
int getval(int p){
int re = 0;
for(;p>0;p-= p&-p)re += bit[p];
return re;
}
int main(){
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n;
for(int i = 1;i<=n;i++){
cin>>arr[i].fs;
all.push_back(arr[i].fs);
arr[i].sc = ++cnt[arr[i].fs];
}
sort(all.begin(),all.end());
all.resize(unique(all.begin(),all.end())-all.begin());
for(int i = 1;i<=n;i++){
arr[i].fs = lower_bound(all.begin(),all.end(),arr[i].fs)-all.begin()+1;
}
int ans = 0;
for(int i = n;i>=1;){
int now = arr[i].fs-getval(arr[i].fs);
int pt = i;
int tval = arr[pt].fs-getval(arr[pt].fs);
while(pt>0&&(tval == now||tval == now-1)){
now = tval;
pt--;
tval = arr[pt].fs-getval(arr[pt].fs);
//cout<<pt<<":"<<tval<<endl;
}
//cout<<pt<<' '<<i<<":"<<tval<<','<<now<<endl;
while(i>pt){
if(arr[i].sc == 1)modify(arr[i].fs,1);
i--;
}
ans++;
}
cout<<ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
6488 KB |
Output is correct |
| 2 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 3 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
6616 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
6488 KB |
Output is correct |
| 2 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 3 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
6616 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
6488 KB |
Output is correct |
| 2 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 3 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
6616 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
6488 KB |
Output is correct |
| 2 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 3 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
6492 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
6616 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
