oj.uz

Submission #570215

# Submission time Handle Problem Language Result Execution time Memory
570215 2022-05-28T20:41:07 Z thatsgonzalez Mountains (NOI20_mountains) C++14
24 / 100
 136 ms 12108 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<ll> vl;
typedef pair <ll,ll> pl;
typedef vector<pl> vpl;

#define s second
#define f first

int n;

struct FT
{
    int n; vl dp;
    FT (int n){
        this->n = n;
        dp.assign(n+1,0);
    }

    int lsb(int x){
        return x & (-x);
    }

    ll query(int ind){
        ll res=0;
        while(ind){
            res+=dp[ind];
            ind-=lsb(ind);
        }
        return res;
    }
    
    void add(int ind, int value){
        while(ind<=n){
            dp[ind]+=value;
            ind+=lsb(ind);
        }
    }
};

int main(){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    FT ft1(n),ft2(n);
    ll a[n]; 
    vpl aux(n);
    for(int i=0; i<n; i++){
      int x; cin>>x; aux[i]={x,i};
    }
    sort(aux.begin(),aux.end()); a[aux[0].s]=1; int temp=1;
    for(int i=1; i<n; i++){
      if(aux[i].f==aux[i-1].f) a[aux[i].s]=temp;
      else temp++, a[aux[i].s]=temp;
    }
    //for(auto &x: a) cout<<x<<" "; cout<<endl; 
    ll mx=0;
    for(int i=n-1; i>=0; i--){
      mx=max(mx,a[i]);
      ft1.add(a[i],1);
    }
    //cout<<query(mx-1,1)<<endl;
    //int top=n+99;
    ll ans=0;
    for(int i=0; i<n; i++){
      ft1.add(a[i],-1);
      //cout<<query(a[i]-1,0)<<" "<<query(a[i]-1,1)<<endl;
      ans+=ft1.query(a[i]-1)*(ft2.query(a[i]-1));
      ft2.add(a[i],1);
    }
    cout<<ans<<endl;

}

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 87 ms 12052 KB Output is correct
3 Correct 98 ms 11988 KB Output is correct
4 Correct 89 ms 12060 KB Output is correct
5 Correct 89 ms 12060 KB Output is correct
6 Correct 95 ms 12048 KB Output is correct
7 Correct 85 ms 11988 KB Output is correct
8 Correct 97 ms 12052 KB Output is correct
9 Correct 93 ms 11988 KB Output is correct
10 Correct 104 ms 12052 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 12048 KB Output is correct
2 Correct 122 ms 12048 KB Output is correct
3 Correct 136 ms 11988 KB Output is correct
4 Correct 125 ms 12052 KB Output is correct
5 Correct 123 ms 12052 KB Output is correct
6 Correct 108 ms 12052 KB Output is correct
7 Correct 125 ms 12056 KB Output is correct
8 Correct 107 ms 12056 KB Output is correct
9 Correct 130 ms 12056 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 12048 KB Output is correct
2 Correct 122 ms 12048 KB Output is correct
3 Correct 136 ms 11988 KB Output is correct
4 Correct 125 ms 12052 KB Output is correct
5 Correct 123 ms 12052 KB Output is correct
6 Correct 108 ms 12052 KB Output is correct
7 Correct 125 ms 12056 KB Output is correct
8 Correct 107 ms 12056 KB Output is correct
9 Correct 130 ms 12056 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 116 ms 12048 KB Output is correct
12 Correct 111 ms 12052 KB Output is correct
13 Correct 128 ms 11988 KB Output is correct
14 Correct 115 ms 12056 KB Output is correct
15 Correct 116 ms 11988 KB Output is correct
16 Correct 114 ms 11988 KB Output is correct
17 Correct 121 ms 12060 KB Output is correct
18 Correct 87 ms 12048 KB Output is correct
19 Correct 89 ms 11988 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 12048 KB Output is correct
2 Correct 122 ms 12048 KB Output is correct
3 Correct 136 ms 11988 KB Output is correct
4 Correct 125 ms 12052 KB Output is correct
5 Correct 123 ms 12052 KB Output is correct
6 Correct 108 ms 12052 KB Output is correct
7 Correct 125 ms 12056 KB Output is correct
8 Correct 107 ms 12056 KB Output is correct
9 Correct 130 ms 12056 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 116 ms 12048 KB Output is correct
12 Correct 111 ms 12052 KB Output is correct
13 Correct 128 ms 11988 KB Output is correct
14 Correct 115 ms 12056 KB Output is correct
15 Correct 116 ms 11988 KB Output is correct
16 Correct 114 ms 11988 KB Output is correct
17 Correct 121 ms 12060 KB Output is correct
18 Correct 87 ms 12048 KB Output is correct
19 Correct 89 ms 11988 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 106 ms 12048 KB Output is correct
22 Correct 101 ms 12108 KB Output is correct
23 Correct 109 ms 12052 KB Output is correct
24 Correct 98 ms 12048 KB Output is correct
25 Correct 114 ms 12048 KB Output is correct
26 Correct 112 ms 12052 KB Output is correct
27 Correct 96 ms 11988 KB Output is correct
28 Correct 71 ms 11988 KB Output is correct
29 Correct 79 ms 12044 KB Output is correct
30 Correct 0 ms 212 KB Output is correct

Subtask #7
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 87 ms 12052 KB Output is correct
3 Correct 98 ms 11988 KB Output is correct
4 Correct 89 ms 12060 KB Output is correct
5 Correct 89 ms 12060 KB Output is correct
6 Correct 95 ms 12048 KB Output is correct
7 Correct 85 ms 11988 KB Output is correct
8 Correct 97 ms 12052 KB Output is correct
9 Correct 93 ms 11988 KB Output is correct
10 Correct 104 ms 12052 KB Output is correct
11 Correct 117 ms 12048 KB Output is correct
12 Correct 122 ms 12048 KB Output is correct
13 Correct 136 ms 11988 KB Output is correct
14 Correct 125 ms 12052 KB Output is correct
15 Correct 123 ms 12052 KB Output is correct
16 Correct 108 ms 12052 KB Output is correct
17 Correct 125 ms 12056 KB Output is correct
18 Correct 107 ms 12056 KB Output is correct
19 Correct 130 ms 12056 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 116 ms 12048 KB Output is correct
22 Correct 111 ms 12052 KB Output is correct
23 Correct 128 ms 11988 KB Output is correct
24 Correct 115 ms 12056 KB Output is correct
25 Correct 116 ms 11988 KB Output is correct
26 Correct 114 ms 11988 KB Output is correct
27 Correct 121 ms 12060 KB Output is correct
28 Correct 87 ms 12048 KB Output is correct
29 Correct 89 ms 11988 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Incorrect 1 ms 212 KB Output isn't correct
32 Halted 0 ms 0 KB -