Submission #197266

#	Time	Username	Problem	Language	Result	Execution time	Memory
197266		stefdasca	Mechanical Doll (IOI18_doll)	C++14	0 / 100	2 ms	324 KiB

doll

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

using namespace std;

int adja[400002], adjb[400002], sw = 1, tot, state[400002];

void build(int p, int st, int dr)
{
    int mid = (st + dr) / 2;
    if(st + 1 == dr)
    {
        if(tot <= mid)
            adja[p] = 1;
        return;
    }
    ++sw;
    adjb[p] = sw;
    build(sw, st, mid);
    if(tot > mid)
    {
        ++sw;
        adja[p] = sw;
        build(sw, mid+1, dr);
    }
    else
        adja[p] = 1;
}

void dfs(int nod, int val)
{
    state[nod] ^= 1;
    if(!state[nod])
    {
        if(adjb[nod])
            dfs(adjb[nod], val);
        else
            adjb[nod] = val;
    }
    else
    {
        if(adja[nod])
            dfs(adja[nod], val);
        else
            adja[nod] = val;
    }
}
void create_circuit(int M, vector<int> A)
{
    int N = A.size();
    vector<int> C;
    C.push_back(A[0]);
    for(int i = 1; i <= M; ++i)
        C.push_back(-1);
    A.push_back(0);
    int sz = 1;
    while(sz * 2 <= (int) A.size() - 1)
        sz *= 2;
    sz *= 2;
    tot = A.size();
    build(1, 1, sz);
    for(int i = 0; i < A.size(); ++i)
        dfs(1, -A[i]);
    vector<int> X(sw), Y(sw);
    for(int k = 0; k < sw; ++k)
    {
        X[k] = -adja[k];
        Y[k] = -adjb[k];
    }
    answer(C, X, Y);
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:62:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for(int i = 0; i < A.size(); ++i)
      |                    ~~^~~~~~~~~~
doll.cpp:50:9: warning: unused variable 'N' [-Wunused-variable]
   50 |     int N = A.size();
      |         ^

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