oj.uz

답안 #285510

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
285510 2020-08-29T07:48:46 Z lukameladze Mountains (NOI20_mountains) C++14
0 / 100
 233 ms 6392 KB 
# include <bits/stdc++.h>
using namespace std;
long long tree[400005],j,n,ans,x,y,id,fix[100005],raod;
pair <long long , long long > a[100005];
void inc(int idx, int val)
{
    for (int i=idx; i<=n; i+=i&(-i))
    {
        tree[i]+=val;
    }
}
long long getans (int idx)
{
    long  long pas=0;
    for (int i=idx; i>0; i-=i&(-i))
    {
        pas+=tree[i];
    }
    return pas;
}
int main()
{
    cin>>n;
    for (int i=1; i<=n; i++)
    {
        cin>>a[i].first;
        a[i].second=i;
    }
    sort(a+1,a+n+1);
    for (int i=1; i<=n; i++)
    {
        if(a[i].first!=a[i-1].first) 
        fix[a[i].second]=1;//cout<<i<<" ";
    }
   // cout<<endl;
    inc(a[1].second,1);
    for (int i=2; i<=n; i++)
    {
        if (fix[a[i].second]==1) 
        { j=i; break;}
        inc(a[i].second,1);
    }
    for (int i=j; i<=n; i++)
    {
        raod++;
        id=a[i].second;
        x=getans(id-1);
        y=getans(n)-getans(id);
       // cout<<id<<" "<<x<<" "<<y<<" "<<x*y<<endl;
        ans+=x*y;
        if (fix[a[i+1].second]==1)
        {
        inc(a[i].second,raod);
        raod=0;
        }
    }
    cout<<ans<<endl;
}

Subtask #1
0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 233 ms 6392 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 59 ms 4344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 59 ms 4344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Incorrect 1 ms 384 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Incorrect 1 ms 384 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 59 ms 4344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 233 ms 6392 KB Output isn't correct
3 Halted 0 ms 0 KB -