Submission #293822

#	Time	Username	Problem	Language	Result	Execution time	Memory
293822		Atill83	Mechanical Doll (IOI18_doll)	C++14	100 / 100	194 ms	24644 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN = (int)2e6 + 5;
int cur = -1;
vector<int> X, Y, C;

int do_it(vector<int> & sm){
    int ad = cur--;
    int nxPw = sm.size();

    while(nxPw == 1 || __builtin_popcount(nxPw) != 1)
        nxPw++;
    int kal = nxPw - sm.size();
    vector<int> nw(nxPw, 313131313);
    if(ad == -1){
        vector<int> pws;
        int mxP;
        for(int j = 20; j >= 0; j--){
            if((1<<j) & nxPw) mxP = j;
            if((1<<j) & kal){
                pws.push_back(j);
            }
        }
        int kt = 0;
        for(int j: pws){
            int cur = (1<<(mxP - j));
            for(int i = kt; i < nw.size(); i += cur) nw[i] = -1;
            kt++;
            kt *= 2;
        }
        int curB = 0;
        for(int l: sm){
            while(nw[curB] != 313131313) 
                curB++;
            nw[curB] = l;
        }
    }else{
        for(int i = 0; i < nw.size(); i++) 
            nw[i] = sm[i];
    }




    int deg = 0;

    for(int i = 1; i < nw.size(); i++){
        deg += (nw[i] != nw[i - 1]);
    }
    if(!deg){
        cur++;
        return nw[0];
    }
    if(nw.size() == 2){
        X[-ad - 1] = nw[0];
        Y[-ad - 1] = nw[1];
        return ad;
    }
    vector<int> ot1, ot2;
    for(int i = 0; i < nw.size(); i+=2)
        ot1.push_back(nw[i]);
    for(int i = 1; i < nw.size(); i+=2)
        ot2.push_back(nw[i]);
    int a = do_it(ot1), b = do_it(ot2);
    X[-ad - 1] = a;
    Y[-ad - 1] = b;
    return ad;
}


void create_circuit(int M, vector<int> A){
    A.push_back(0);
    int N = A.size();
    X.resize(MAXN, 0);
    Y.resize(MAXN, 0);
    C.resize(M + 1, 0);
    C[0] = do_it(A);
    for(int i = 1; i <= M; i++) C[i] = C[0];
    X.resize(-cur - 1);
    Y.resize(-cur - 1);
    /*for(int i = 0; i < X.size(); i++){
        cerr<<X[i]<<" "<<Y[i]<<endl;
    }*/
    answer(C, X, Y);
}

Compilation message (stderr)

doll.cpp: In function 'int do_it(std::vector<int>&)':
doll.cpp:28:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |             for(int i = kt; i < nw.size(); i += cur) nw[i] = -1;
      |                             ~~^~~~~~~~~~~
doll.cpp:39:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int i = 0; i < nw.size(); i++)
      |                        ~~^~~~~~~~~~~
doll.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for(int i = 1; i < nw.size(); i++){
      |                    ~~^~~~~~~~~~~
doll.cpp:61:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for(int i = 0; i < nw.size(); i+=2)
      |                    ~~^~~~~~~~~~~
doll.cpp:63:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(int i = 1; i < nw.size(); i+=2)
      |                    ~~^~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:74:9: warning: unused variable 'N' [-Wunused-variable]
   74 |     int N = A.size();
      |         ^
doll.cpp: In function 'int do_it(std::vector<int>&)':
doll.cpp:27:32: warning: 'mxP' may be used uninitialized in this function [-Wmaybe-uninitialized]
   27 |             int cur = (1<<(mxP - j));
      |                           ~~~~~^~~~

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