Submission #760835

#	Time	Username	Problem	Language	Result	Execution time	Memory
760835		alexander707070	Mechanical Doll (IOI18_doll)	C++14	70.67 / 100	237 ms	11356 KiB

doll

#include<bits/stdc++.h>
#include "doll.h"
#define MAXN 800007
using namespace std;
 
int m,power,n,num;
int a[MAXN],s,ind[MAXN],temp[MAXN];
int lt[MAXN],rt[MAXN];
vector<int> from,to,c;

int rev(int x){
    int res=0;
    for(int i=1;i<power;i*=2){
        res*=2; res+=x%2; 
        x/=2;
    }
    return res;
}
 
void build(int v,int l,int r){
    if(l+1==r){
        if(l<n)lt[v]=a[l];
        else lt[v]=-1;

        if(r<n)rt[v]=a[r];
        else if(r==power-1)rt[v]=0;
        else rt[v]=-1;
    }else{
        int tt=(l+r)/2;
        if(l>=n and tt<power-1){
            lt[v]=-1;
        }else{
            num++; lt[v]=-num;
            build(num,l,tt);
        }

        if(tt+1>=n and r<power-1){
            rt[v]=-1;
        }else{
            num++; rt[v]=-num;
            build(num,tt+1,r);
        }
    }
}

bool cmp(int x,int y){
    return rev(x)<rev(y);
}
 
void create_circuit(int M, vector<int> A){
    m=M; n=int(A.size());
 
    for(int i=0;i<n;i++){
        a[i]=A[i]; ind[i]=i;
    }

    power=1; num=1;
    while(power<n+1)power*=2;

    sort(ind,ind+n,cmp);

    for(int i=0;i<n;i++)temp[ind[i]]=a[i];
    for(int i=0;i<n;i++)a[i]=temp[i];

    build(1,0,power-1);
 
    for(int i=0;i<=m;i++)c.push_back(-1);
 
    for(int i=1;i<=num;i++){
        from.push_back(lt[i]);
        to.push_back(rt[i]);
    }
    answer(c,from,to);
}
 
/*
int main(){
     create_circuit(4, {1, 2, 1,3,2,4,3,1,2});
}
*/

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 14.7580402392 / 18
• Subtask 6: 45.9139029664 / 56