Submission #311658

#	Time	Username	Problem	Language	Result	Execution time	Memory
311658		saarang123	Cave (IOI13_cave)	C++14	13 / 100	33 ms	384 KiB

cave

#include "cave.h"

void exploreCave(int n) {
    int a[n], s[n], d[n];
    for(int i = 0; i < n; i++)
        a[i] = 0, s[i] = 0, d[i] = -1;
    int x = tryCombination(a);
    while(x != -1) {
        int id;
        int mn = 0, mx = n;
        while(mn < mx) {
            int mid = (mn + mx) >> 1;
            //cout << "Binsearch: " << mn << " " << mid << " " << mx << endl;
            for(int i = mn; i <= mid; i++)
                if(d[i] == -1) a[i] ^= 1;
            int k = tryCombination(a);
            for(int i = mn; i <= mid; i++)
                if(d[i] == -1) a[i] ^= 1;
            if(k != x)
                mx = mid;
            else
                mn = mid + 1;
        }
        id = mn;
        //cout << "Binsearch end: " << id << " " << x << endl; cout << endl;
        d[id] = x;
        a[id] ^= 1;
        x = tryCombination(a);
    }
    for(int i = 0; i < n; i++) s[i] = a[i];
    //answer(s, d);
    for(int i = 0; i < n; i++) {
        if(d[i] != -1) continue;
        s[i] ^= 1;
        d[i] = tryCombination(s);
        s[i] ^= 1;
    }
    answer(s, d);
}

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