Submission #764237

#	Time	Username	Problem	Language	Result	Execution time	Memory
764237		t6twotwo	Mechanical Doll (IOI18_doll)	C++17	47 / 100	75 ms	9396 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> ord(int lg) {
    int N = 1 << lg;
    vector<int> ans(N), s(N);
    int x = 1, t = 0;
    while (1) {
        if (x >= N) {
            ans[x - N] = t++;
            if (x == 2 * N - 1) {
                break;
            }
            x = 1;
        } else {
            if (s[x] == 0) {
                s[x] = 1;
                x = x * 2;
            } else {
                s[x] = 0;
                x = x * 2 + 1;
            }
        }
    }
    return ans;
}
void create_circuit(int M, vector<int> A) {
    int N = A.size();
    int lg = __lg(N - 1) + 1;
    int K = 1 << lg;
    vector<int> C(M + 1, -1), X(K - 1, -1), Y(K - 1, -1);
    C[0] = A[0];
    for (int i = 0; i < (K / 2) - 1; i++) {
        X[i] = ~(2 * i + 1);
        Y[i] = ~(2 * i + 2);
    }
    auto a = ord(lg);
    for (int i = 0; i < K / 2; i++) {
        if (a[i * 2] < N - 1) {
            X[i + K / 2 - 1] = A[a[i * 2] + 1];
        }
        if (a[i * 2 + 1] < N - 1) {
            Y[i + K / 2 - 1] = A[a[i * 2 + 1] + 1];
        }
    }
    Y[K - 2] = 0;
    answer(C, X, Y);
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 9.0000000036 / 18
• Subtask 6: 28.0000000112 / 56