Submission #218313

#	Time	Username	Problem	Language	Result	Execution time	Memory
218313		edsa	Mechanical Doll (IOI18_doll)	C++17	12 / 100	1086 ms	37232 KiB

doll

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;
using vii = vector<ii>;
const ll MOD = 998244353;
const int INF = 1e9+9;
const int MAXN = 1100006;

#include "doll.h"

int sm[MAXN], add[MAXN], nxt[MAXN];
vi gr[MAXN];
vi C, X, Y;

void create_circuit(int M, vector<int> A) {
    for (int i = 1; i < (int) A.size(); ++i) {
        gr[A[i-1]].push_back(A[i]);
    }
    gr[A.back()].push_back(0);
    C.resize(M+1);
    C[0] = A[0];

    for (int i = 1; i <= M; ++i) {
        if (gr[i].empty()) {
            C[i] = 0;
            continue;
        }
        if (gr[i].size() == 1) {
            C[i] = gr[i][0];
            continue;
        }

        int n = 2;
        while (n < (int)gr[i].size())
            n<<=1;
        int extra = n-(int)gr[i].size();

        sm[1] = 0;
        add[1] = 1;
        for (int j = 1; j < n; ++j) {
            sm[j<<1] = sm[j];
            sm[j<<1|1] = sm[j]+add[j];
            add[j<<1] = add[j<<1|1] = add[j]<<1;
        }
        for (int j = 0, erased = 0; j < n; ++j) {
            if (sm[n+j] < extra) {
                erased++;
            } else {
                nxt[sm[n+j]] = gr[i][j-erased];
            }
        }

        int fSw = X.size(); // first new switch
        C[i] = -fSw-1;
        sm[fSw] = 0;
        add[fSw] = n>>1;
        X.emplace_back(), Y.emplace_back();
        for (int s = fSw; s < (int) X.size(); ++s) {
            if (add[s] == 1) {
                X[s] = sm[s] < extra? -fSw-1 : nxt[sm[s]];
                Y[s] = nxt[sm[s]+1];
                continue;
            }
            if (sm[s]+add[s] <= extra) {
                X[s] = -fSw-1;
            } else {
                X[s] = -X.size()-1;
                sm[X.size()] = sm[s];
                add[X.size()] = add[s]>>1;
                X.emplace_back(), Y.emplace_back();
            }
            Y[s] = -X.size()-1;
            sm[X.size()] = sm[s]+add[s];
            add[X.size()] = add[s]>>1;
            X.emplace_back(), Y.emplace_back();
        }
    }

    for (int i = 0; i <= M; ++i) {
        cerr << C[i] << ' ';
    }
    cerr << endl;
    for (int i = 0; i < (int) X.size(); ++i) {
        cerr << X[i] << ' ' << Y[i] << endl;
    }
    answer(C, X, Y);
}

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