Submission #45180

#	Time	Username	Problem	Language	Result	Execution time	Memory
45180		ikura355	Library (JOI18_library)	C++14	100 / 100	499 ms	716 KiB

library

#include "library.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn = 1e3 + 5;
int n;
int vis[maxn];
vector<int> vec, ans;
int link(int st) {
    vector<int> a;
    vis[st] = 1;
    for(int i=1;i<=n;i++) if(!vis[i]) a.push_back(i);
    int l = 0, r = a.size()-1;
    while(l<r) {
        //ask
        int mid = (l+r)/2;
        for(int i=l;i<=mid;i++) vec[a[i]-1] = 1;
        int bef = Query(vec);
        vec[st-1] = 1;
        int aft = Query(vec);
        //reset
        for(int i=l;i<=mid;i++) vec[a[i]-1] = 0;
        vec[st-1] = 0;
        //divide
        if(bef==aft) r = mid;
        else l = mid+1;
    }
//    printf("%d -> %d\n",st,a[l]);
    return a[l];
}
void Solve(int N) {
    n = N;
    if(n==1) return Answer({1});
    vec.clear(); ans.clear();
    memset(vis,0,sizeof(vis));
    //1000
    int st = -1;
    for(int i=0;i<n;i++) vec.push_back(0);
    for(int x=1;x<=n;x++) {
        for(int i=1;i<=n;i++) vec[i-1] = (x!=i);
        if(Query(vec)==1) st = x;
    }
    ans.push_back(st);
    //1000 * 10
    for(int i=0;i<n;i++) vec[i] = 0;
    for(int i=1;i<n;i++) ans.push_back(link(ans[i-1]));
    Answer(ans);
}

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