Submission #147515

#	Time	Username	Problem	Language	Result	Execution time	Memory
147515		Bodo171	Mechanical Doll (IOI18_doll)	C++14	37 / 100	133 ms	10968 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
const int nmax=400005;
vector<int> C,X,Y,a,act;
int et[nmax];
int p,u,ets,i,lg;
int build(int nod,int l,int r)
{
    if(l==r)
        return act[l];
    int m=(l+r)/2;
    ++ets;et[nod]=ets;
    X[et[nod]-1]=build(2*nod,l,m);
    Y[et[nod]-1]=build(2*nod+1,m+1,r);
    return -et[nod];
}
int rev(int x,int lg)
{
    int ret=0;
    for(int b=0;b<lg;b++)
    {
        if((x&(1<<b)))
            ret|=(1<<(lg-b-1));
    }
    return ret;
}
void create_circuit(int M, std::vector<int> A) {
  int n = A.size();
  C.resize(M+1);
  for(i=0;i<=M;i++)
    C[i]=-1;
  while((1<<lg)<n+1)
    lg++;
  act.resize((1<<lg),0);
  for(i=0;i<(1<<lg);i++)
    act[i]=-1;
  for(i=0;i<A.size();i++)
        act[rev(i,lg)]=A[i];
  act[(1<<lg)-1]=0;
  X.resize((1<<lg)-1);Y.resize((1<<lg)-1);
  build(1,0,(1<<lg)-1);
  answer(C, X, Y);
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:38:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |   for(i=0;i<A.size();i++)
      |           ~^~~~~~~~~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9 / 18
• Subtask 6: 28 / 56