Submission #891665

#	Time	Username	Problem	Language	Result	Execution time	Memory
891665		vjudge1	Mechanical Doll (IOI18_doll)	C++17	100 / 100	128 ms	17472 KiB

doll

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

using namespace std;

using vi = vector<int>;

vi X, Y;

vector<pair<int, int> > VP;

int gen(int niv, int nr) {
    int id = X.size();
    X.push_back(0);
    Y.push_back(0);
    //cout << niv << " " << nr << "\n";
    if(niv == 1 && nr == 2) {
        return -id - 1; 
    } else if(niv == 1 && nr == 1) {
        X[id] = -1;
        return -id - 1;
    }
    
    if(nr <= (1 << (niv - 1))) {
        int S = gen(niv - 1, nr);
        Y[id] = S;
        X[id] = -1;
        return -id - 1;
    } else {
        Y[id] = gen(niv - 1, (1 << (niv - 1)));
        X[id] = gen(niv - 1, nr - (1 << (niv - 1)));
        return -id - 1;
    }
    return -id - 1;

}

void create_circuit(int M, vi A) {
    A.push_back(0);
    map<int, int> Fr;
    int frmax = 0;
    for(auto it : A) {
        ++Fr[it];
        frmax = max(frmax, Fr[it]);
    }
    if(frmax <= 4) {
        int ult = 0;
        vector<vi> Urm(M + 1);
        for(int i = 0; i < A.size(); ++i) {
            Urm[ult].push_back(A[i]);
            ult = A[i];
        }
        vi C(M + 1, -1), X, Y;

        for(int i = 0; i <= M; ++i) {
            if(Urm[i].empty()) {
                C[i] = 0;
                continue;
            }
            if(Urm[i].size() == 1) {
                C[i] = Urm[i][0];
                continue;
            }
            if(Urm[i].size() == 2) {
                X.push_back(Urm[i][0]);
                Y.push_back(Urm[i][1]);
                C[i] = -X.size();
                continue;
            }
            if(Urm[i].size() == 3) {
                int id = X.size();
                X.push_back(-id-2);
                Y.push_back(-id-3);
                X.push_back(Urm[i][0]);
                Y.push_back(Urm[i][1]);
                X.push_back(-id - 1);
                Y.push_back(Urm[i][2]);
                C[i] = -id - 1;
                continue;
            }
            if(Urm[i].size() == 4) {
                int id = X.size();
                X.push_back(-id-2);
                Y.push_back(-id-3);
                X.push_back(Urm[i][0]);
                Y.push_back(Urm[i][2]);
                X.push_back(Urm[i][1]);
                Y.push_back(Urm[i][3]);
                C[i] = -id - 1;
                continue;
            }
            assert(0);
        }
       // cout << "C: ";
       // for(auto it : C)
       //     cout << it << " ";
       // cout << "\n";
       // cout << "X: ";
       // for(auto it : X)
       //     cout << it << " ";
       // cout << "\n";
       // cout << "Y: ";
       // for(auto it : Y)
       //     cout << it << " ";
       // cout << "\n";
        answer(C, X, Y);
    } else {
        int niv = 1;
        while((1 << niv) <= A.size()) ++niv;
        gen(niv, A.size());
        vi C(M + 1, -1);

        vi Stare(X.size(), 0);

        int u = -1, p = 0;
        ////cout << "ASSIGN\n";
        do {
            if(u > 0) {
                u = -1;
            }
            int id = -u - 1;
            if(!Stare[id]) {
                Stare[id] ^= 1;
                if(X[id]) u = X[id];
                else {
                    u = X[id] = A[p++];
                }
            } else {
                Stare[id] ^= 1;
                if(Y[id]) u = Y[id];
                else {
                    u = Y[id] = A[p++];
                }
            }
        } while(u != 0);

        int nr0 = 0;
        for(auto &it : X) nr0 += !it;
        for(auto &it : Y) nr0 += !it;

        //cout << "In total " << nr0 << "\n";


        //for(auto it : Stare)
            //cout << it << " ";
        //cout << "\n";

        //cout << "C: ";
        //for(auto it : C) 
            //cout << it << " ";
        //cout << "\n";
        //cout << "X: ";
        //for(auto it : X) 
            //cout << it << " ";
        //cout << "\n";
        //cout << "Y: ";
        //for(auto it : Y) 
            //cout << it << " ";
        //cout << "\n";
        answer(C, X, Y);
    }
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, vi)':
doll.cpp:49:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |         for(int i = 0; i < A.size(); ++i) {
      |                        ~~^~~~~~~~~~
doll.cpp:109:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |         while((1 << niv) <= A.size()) ++niv;
      |               ~~~~~~~~~~~^~~~~~~~~~~

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