Submission #1060164

#	Time	Username	Problem	Language	Result	Execution time	Memory
1060164		new_acc	Mechanical Doll (IOI18_doll)	C++14	37 / 100	97 ms	16196 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
const int N=5e5+10;
int g[N][2],nw[N];
bool bb[N],usu[N];
void create_circuit(int m, vi a) {
    a.push_back(0); 
    int n=a.size(),w=1;
    while(w<n) w*=2;
    for(int i=w/2;i<w;i++) usu[i]=1;
    for(int i=1;i<w/2;i++) g[i][0]=i*2,g[i][1]=i*2+1;
    for(int i=w/2;i<w;i++) g[i][0]=-1,g[i][1]=-1;
    for(int i=n;i>=1;i--){
        int curr=1; 
        while(curr<w/2){
            bb[curr]^=1;
            curr=g[curr][bb[curr]];
        }
        bb[curr]^=1;
        g[curr][bb[curr]]=a[i-1];
        usu[curr]=0;
    }
    for(int i=w/2;i<w;i++){
        if(g[i][0]==-1 and g[i][1]==-1) usu[i]=1;
    }
    for(int i=w/2-1;i>=1;i--){
        if(usu[i*2] and usu[i*2+1]) usu[i]=1; 
    }
    int li=0;
    for(int i=1;i<w;i++){
        if(usu[i]) continue;
        nw[i]=++li;
    }
    vi c,x(li),y(li);
    for(int i=0;i<=m;i++) c.push_back(-1);
    for(int i=1;i<w/2;i++){
        if(usu[i]) continue;
        if(usu[i*2]) x[nw[i]-1]=-1;
        else x[nw[i]-1]=-nw[g[i][0]];
        if(usu[i*2+1]) y[nw[i]-1]=-1;
        else y[nw[i]-1]=-nw[g[i][1]];
    }
    for(int i=w/2;i<w;i++){
        if(usu[i]) continue;
        x[nw[i]-1]=g[i][0];
        y[nw[i]-1]=g[i][1];
    }
    //for(auto u:x) cout<<u<<"\n";
    answer(c,x,y);
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9 / 18
• Subtask 6: 28 / 56