Submission #759804

#	Time	Username	Problem	Language	Result	Execution time	Memory
759804		raysh07	Cave (IOI13_cave)	C++17	0 / 100	420 ms	376 KiB

cave

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

void exploreCave(int N) {
    int n = N;
    
    bool fixed[n];
    int con[n];
    for (int i = 0; i < n; i++) fixed[i] = false;
    int ans[n];
    int v;
    
    for (int i = 0; i < n; i++){
        //try all 0s 
        for (int j = 0; j < n; j++){
            if (!fixed[j]) con[j] = 0;
        }
        
        v = tryCombination(con);
        int got = 1;
        if (v == i + 1) got = 0;
        
        int l = 0, r = n - 1;
        while (r != l){
            int m = (l + r)/2;
            //check if answer is among [l, mid] 
            for (int j = 0; j < n; j++) {
                if (fixed[j]) continue;
                if (j >= l && j <= m) con[j] = got;
                else con[j] = got ^ 1;
            }
            
            v = tryCombination(con);
            if (v == i + 1) r = m;
            else l = m + 1;
        }
        
        con[l] = got;
        fixed[l] = true;
        
        ans[l] = i;
    }
    
    answer(con, ans);
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24