Submission #993061

#	Time	Username	Problem	Language	Result	Execution time	Memory
993061		MrM7md	Cave (IOI13_cave)	C++17	100 / 100	188 ms	660 KiB

cave

#include <bits/stdc++.h>
#include "cave.h"
using namespace std;
// #define int long long
#define endl '\n'
#define F first
#define S second
#define pb push_back
#define all(a) a.begin(),a.end()
const int NN=1e6+50000;
const int MOD=1e9+7;
const int off=(1<<11);
 
#define ask(x) tryCombination(x);
 
void exploreCave(int N){
    int S[N],D[N],done[N];
    for(int i=0;i<N;i++){
        S[i]=D[i]=done[i]=0;
    }
    for(int i=0;i<N;i++){
        vector<int>vec;
        for(int j=0;j<N;j++){
            if(done[j])continue;

            S[j]=0;
            vec.pb(j);
        }
        int x=ask(S);

        if(x>i || x==-1)x=0;
        else x=1;
 
        int l=0,r=vec.size()-1;
        int ans = vec[0];
        while(l<r){
            int md=(l+r)/2;
            for(int j=l;j<=md;j++){
                S[vec[j]]=1;
            }
            for(int j=md+1;j<=r;j++){
                S[vec[j]]=0;
            }

            int cur=ask(S);
            if(cur == -1) cur = N+1;
            if(x==1){
                if(cur>i){
                    r=md;
                    ans = vec[md];
                }
                else{
                    l=md+1;
                    ans=vec[md+1];
                }
            }
            else{
                if(cur>i){
                    l=md+1;
                    ans = vec[md + 1];
                }
                else{
                    r=md;
                    ans=vec[md];
                }
            }
        }
        D[ans]=i;
        S[ans]=x;
        done[ans]=1;
    }
    answer(S,D);
 
}
// signed main(){
//     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
// }

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24