Submission #601562

#	Time	Username	Problem	Language	Result	Execution time	Memory
601562		Mazaalai	Mechanical Doll (IOI18_doll)	C++17	37 / 100	173 ms	13260 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
#define sz(x) (int)x.size()
#define ALL(x) x.begin(), x.end()
#define pb push_back
#define ff first
#define ss second
using namespace std;
using VI = vector <int>;
using PII = pair <int, int>;
int n, m, p = 1;
VI c, x, y, state;
int switchNo = 1;
bool vis;
int generate(int l, int r) {
    if (l == r) {
        return (r+n < p ? -1 : 0); // not switch // makes n+1 zero
    }
    int mid = (l+r)>>1, curNode = switchNo++;
    x[curNode] = generate(l, mid);
    y[curNode] = generate(mid+1, r);

    // cout << curNode << ": " << x[curNode] << ',' << y[curNode] << " -> " << l << ' ' << r << '\n';
    return -curNode;
}
bool last;
void addPos(int pos, int v) { // removes n zero
    int& nx = (state[-pos] ? y[-pos] : x[-pos]);
    state[-pos] ^= 1;
    if (nx == 0) {
        nx = v;
        last = v;
        c[v] = -1;
        return;
    }
    return addPos(nx, v);
}
void create_circuit(int M, vector<int> nums) {
    m = M;
    n = sz(nums);
    c = VI(m+1, 0);
    while(p <= n) p *= 2;
    x = VI(2*p, 0);
    y = VI(2*p, 0);
    state = VI(2*p, 0);
    generate(1, p);
    c[0] = -1;
    for (int i = 0; i < n; i++) {
        addPos(-1, nums[i]);
    }
    x.resize(switchNo);
    y.resize(switchNo);
    reverse(ALL(x));
    reverse(ALL(y));
    x.pop_back();
    y.pop_back();
    reverse(ALL(x));
    reverse(ALL(y));
    // cout << "C: ";
    // for (int i = 0; i < m; i++) cout << c[i] << " \n"[i==m-1];
    // cout << "XY: ";
    // for (int i = 0; i < sz(x); i++) cout << x[i] << ',' << y[i] << " \n"[i==sz(x)-1];
    answer(c, x, y);
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9 / 18
• Subtask 6: 28 / 56