Submission #75058

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
75058	2018-09-08 08:06:54	dacin21	Mechanical Doll (IOI18_doll)	C++14	100 / 100	143 ms	12400 KiB

doll

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#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
int bit_mirror(int A, int digits){
    int ret = 0;
    while(digits--){
        ret = ret<<1 | (A&1);
        A>>=1;
    }
    return ret;
}
void create_circuit(int M, vector<int> A){
    const int lgn = __lg(2*A.size()-1);
    const int N = 1<<lgn;
    assert(N/2 < A.size() && A.size() <= N);
    // remove surplus subtrees
    vector<char> dead(2*N, 0);
    int m = N - A.size();
    for(int i=lgn, j=1;i>=0;--i,j=2*j){
        if((m>>i)&1){
            dead[j] = 1;
            ++j;
        }
    }
    for(int i=1;i<N;++i){
        if(dead[i]){
            dead[2*i] = dead[2*i+1] = 1;
        }
 
 
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Compilation message (stderr)

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from doll.cpp:2:
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:17:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     assert(N/2 < A.size() && A.size() <= N);
      |            ~~~~^~~~~~~~~~
doll.cpp:17:39: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'const int' [-Wsign-compare]
   17 |     assert(N/2 < A.size() && A.size() <= N);
      |                              ~~~~~~~~~^~~~

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