Submission #1294758

#	Time	Username	Problem	Language	Result	Execution time	Memory
1294758		cnastea	Cave (IOI13_cave)	C++20	100 / 100	174 ms	524 KiB

cave

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

void exploreCave(int n) {
    int k, q;
    int b[n], c[n]; for(int i = 0; i < n; i++) b[i] = -1;
    for(int j = 0; j < n; j++){
        int a[n]; for(int i = 0; i < n; i++) {a[i] = 0; if(b[i] == 1) a[i] = 1;}
        k = tryCombination(a);
        q = 0; if(k == j) q = 1; for(int i = 0; i < n; i++) if(b[i] == -1) a[i] = (q^1);
        int l = 0, r = n;
        while(r-l > 1){
            int m = (l+r)/2;
            for(int i = l; i < m; i++) if(b[i] == -1) a[i] = q;
            k = tryCombination(a);
            if(k != j){
                for(int i = l; i < m; i++) if(b[i] == -1) a[i] = (q^1);
                r = m;
            }
            else l = m;
        }
        b[l] = q; c[l] = j;
    }
    answer(b, c);
}

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