Submission #754208

#	Time	Username	Problem	Language	Result	Execution time	Memory
754208		nicksms	Cave (IOI13_cave)	C++17	100 / 100	924 ms	660 KiB

cave

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

int ans[5000], w[5000], q[5000];

void exploreCave(int N) {
    for (int i = 0; i < N; i++) {
        memset(q,0,5000*sizeof(int));
        for (int j = 0; j < i; j++) q[ans[j]]=w[j];
        w[i]=(tryCombination(q)==i);
        for (int b = 1; b < N; b<<=1) {
            memset(q,0,5000*sizeof(int));
            for (int k = 0; k < N; k++) {
                q[k]=1 ^ w[i] ^ bool(k & b);
            }
            for (int j = 0; j < i; j++) q[ans[j]]=w[j];
            if (tryCombination(q)!=i) ans[i] |= b;
        }
    }
    for (int i = 0; i < N; i++) q[ans[i]]=w[i];
    for (int i = 0; i < N; i++) w[ans[i]]=i;
    answer(q,w);
}

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