Submission #550552

#	Time	Username	Problem	Language	Result	Execution time	Memory
550552		esomer	Cave (IOI13_cave)	C++17	100 / 100	841 ms	460 KiB

cave

#include "cave.h"
#include<bits/stdc++.h>

using namespace std;

/*int n; //

int tryCombination(int v[]){
    for(int i = 0; i < n; i++) cout << v[i] << " ";
    cout << endl;
    int rep; cin >> rep;
    return rep;
}

void answer(int s[], int d[]){
    cout << "S: "<<endl;
    for(int i = 0; i < n; i++) cout << s[i] << " ";
    cout << endl << "D: "<<endl;
    for(int i = 0; i < n; i++) cout << d[i] << " ";
}*/


void exploreCave(int N) {
    //n = N; //
    vector<int> correct(N, -1);
    vector<int> switches(N, -1);
    for(int i = 0; i < N; i++){
        if(correct[i] == -1){
            int v[N];
            for(int j = 0; j < N; j++) v[j] = 0;
            for(int j = 0; j < i; j++) v[switches[j]] = correct[j];
            int x = tryCombination(v);
            if(x == -1){
                for(int j = i; j < N; j++) correct[j] = 0;
            }else{
                for(int j = i; j < x; j++) correct[j] = 0;
                correct[x] = 1;
            }
        }
        /*cout << "I'm on I: "<<i << " correct: "<<endl;
        for(int x : correct) cout << x << " ";
        cout << endl << "Switches: "<<endl;
        for(int x : switches) cout << x << " ";
        cout << endl;*/
        int lo = 0;
        int hi = N - 1;
        while(lo < hi){
            int mid = (lo + hi) / 2;
            int v[N];
            for(int j = 0; j < N; j++) v[j] = 1 - correct[i];
            for(int j = lo; j <= mid; j++) v[j] = correct[i];
            for(int j = 0; j < i; j++){
                v[switches[j]] = correct[j];
            }
            int x = tryCombination(v);
            if(x > i || x == -1){
                hi = mid;
            }else lo = mid + 1;
        }
        switches[i] = lo;
    }
    int d[N];
    for(int i = 0; i < N; i++){
        d[switches[i]] = i;
    }
    int s[N];
    for(int i = 0; i < N; i++){
        s[switches[i]] = correct[i];
    }
    answer(s, d);
}

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