Submission #45173

#	Time	Username	Problem	Language	Result	Execution time	Memory
45173		ikura355	Library (JOI18_library)	C++14	19 / 100	1749 ms	262144 KiB

library

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

const int maxn = 1e3 + 5;

int n;
vector<int> vec;
int rec[maxn*4];
vector<int> way[maxn];
vector<int> ans;

int ask(int l, int r, int x) {
    for(int i=l;i<=r;i++) vec[i-1] = 1;
    if(x) vec[x-1] = 1;
    int temp = Query(vec);
    for(int i=l;i<=r;i++) vec[i-1] = 0;
    if(x) vec[x-1] = 0;
    return temp;
}

void build(int pos, int l, int r) {
    if(l>r) return ;
    rec[pos] = ask(l,r,0);
    if(l==r) return ;
    int mid = (l+r)/2;
    build(pos<<1,l,mid); build(pos<<1|1,mid+1,r);
}

void addedge(int x, int pos, int l, int r) {
    if(l>r || x<=l) return ;
//    printf("ask [%d, %d] : %d = %d original = %d\n",l,r,x,ask(l,r,x),ask(l,r,0));
    if(ask(l,r,x)>rec[pos]) return ;
    if(l==r) {
//        printf("%d <-> %d\n",l,x);
        way[x].push_back(l);
        way[l].push_back(x);
        return ;
    }
    int mid = (l+r)/2;
    addedge(x,pos<<1,l,mid); addedge(x,pos<<1|1,mid+1,r);
}

void dfs(int u, int last) {
//    printf("dfs %d\n",u,last);
    ans.push_back(u);
    for(auto v : way[u]) {
        if(v==last) continue;
        dfs(v, u);
    }
}

void Solve(int N) {
    if(N==1) {
        Answer({1});
        return ;
    }
    n = N;
    for(int i=0;i<n;i++) vec.push_back(0);
    build(1,1,n);
    for(int x=1;x<=n;x++) addedge(x,1,1,n);
    for(int x=1;x<=n;x++) {
        if(way[x].size()==1) {
            dfs(x, 0);
            Answer(ans);
            return ;
        }
    }
}

• Subtask 1: 19 / 19
• Subtask 2: 0 / 81