Submission #992992

#	Time	Username	Problem	Language	Result	Execution time	Memory
992992		vjudge1	Cave (IOI13_cave)	C++17	13 / 100	215 ms	524 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++){
        for(int j=0;j<N;j++){
            if(!done[j])
            S[j]=0;
        }
        int x=ask(S);
 
        if(x<=i && x!=-1)x=1;
        else x=0;
 
        int l=0,r=N-1;
        int ans = 0;
        while(l<r){
            int md=(l+r)/2;
            for(int j=l;j<=md;j++){
                if(done[j])continue;
                S[j]=1;
            }
            for(int j=md+1;j<=r;j++){
                if(done[j])continue;
                S[j]=0;
            }
            int cur=ask(S);
            if(cur == -1) cur = 101002;
            if(x==1){
                if(cur>i){
                    r=md;
                    ans = md;
                }
                else{
                    l=md+1;
                }
            }
            else{
                if(cur>i){
                    l=md+1;
                    ans = md + 1;
                }
                else{
                    r=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: 0 / 12
• Subtask 2: 13 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24