Submission #1093311

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093311		asli_bg	Untitled (POI11_rot)	C++11	0 / 100	24 ms	19680 KiB

Main

#pragma GCC optimize("O3,unroll-loops")

#include <bits/stdc++.h>
using namespace std;

//#define int long long

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;

typedef tree<int,null_type,less<int>,rb_tree_tag,
tree_order_statistics_node_update> inset;
 
#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define pb push_back
 
#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)
#define cont(x) {for(auto el:x) cout<<el<<' ';cout<<endl;}
#define contp(x) {for(auto el:x) cout<<el.fi<<'-'<<el.se<<' ';cout<<endl;}
#define sp <<" "<<
#define mid (l+r)/2
#define endl '\n'
 
#define DEBUG(X) {cout<<#X<<' '<<(X)<<endl;}
 
#define carp(x,y) ((x%MOD)*(y%MOD))%MOD
#define topla(x,y) ((x%MOD)+(y%MOD))%MOD
 
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vii;
typedef vector<bool> vb;
 
const int MAXN=1e5+5;
const int INF=1e9+7;
const int MOD=1e9+7;

int n;
//int adj[MAXN][2];
int t[MAXN*4];

void oku(int nd){
    int el;
    cin>>el;
    if(el!=0){
        t[nd]=el;
        return;
    }
    t[nd]=-1;
    oku(nd*2);
    oku(nd*2+1);
}

int inv[4*MAXN];
inset s[MAXN];

void merge(int nd,int sol,int sag){
    //cout<<"here"<<endl;
    
    if(s[sol].size()<s[sag].size()) swap(sol,sag);
    s[nd]=s[sol];
    inv[nd]+=inv[sol];

    if(t[nd]!=-1) s[sag].insert(t[nd]);

    //cont(s[sol]);
    //cont(s[sag]);

    for(auto el:s[sag]){
        inv[nd]=s[nd].size()-s[nd].order_of_key(el);
        s[nd].insert(el);
    }
}

void dfs(int nd,int ata){ 
    if(t[nd]==0) return;
    dfs(nd*2,ata);
    dfs(nd*2+1,ata);
    merge(nd,nd*2,nd*2+1);
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin>>n;

    oku(1);
    dfs(1,0);

    cout<<inv[1]<<endl;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 9
• Subtask 5: 0 / 9
• Subtask 6: 0 / 9
• Subtask 7: 0 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 9
• Subtask 10: 0 / 9
• Subtask 11: 0 / 10