Submission #301006

#	Time	Username	Problem	Language	Result	Execution time	Memory
301006		TMJN	Mechanical Doll (IOI18_doll)	C++17	Compilation error	0 ms	0 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;

static int c;
static vector<int>K;
static vector<int>X,Y,C;

int dfs(int num,int dep){
	if(num+(1<<dep)>=K.size()){
		return K[num];
	}
	else{
		int t=c;
		c++;
		X[t]=dfs(num,dep+1);
		Y[t]=dfs(num+(1<<dep),dep+1);
		return -t-1;
	}
}

void create_circuit(int M,vector<int>A){
	c=0;
	K=A;
	X=Y=vector<int>(400000,0);
	C=vector<int>(M+1,0);
	for(int i=0;;i++){
		if(K.size()<(1<<i)){
			while(K.size()<(1<<i)){
				K.push_back(-c-1);
				c++;
			}
			c--;
			K.back()=0;
			break;
		}
	}
	int cc=c;
	int tt=dfs(0,0);
	C=vector<int>(M+1,tt);
	for(int i=0;i<cc;i++){
		X[i]=-i-1;
		Y[i]=tt;
	}
	vector<bool>B(400000,false);
	int p=0;
	vector<int>T;
	do{
		if(p>=0){
			if(p)T.push_back(p);
			p=C[p];
		}
		else{
			if(B[-p-1]){
				B[-p-1]=!B[-p-1];
				p=Y[-p-1];
			}
			else{
				B[-p-1]=!B[-p-1];
				p=X[-p-1];
			}
		}
	}while(p);
	assert(A==T);
	bool f=false;
	for(int i=0;i<400000;i++){
		f|=B[i];
	}
	assert(!f);
	for(int i:C){
		assert(-(int)X[i].size()<=i&&i<=M);
	}
	answer(C,X,Y);
}

Compilation message (stderr)

doll.cpp: In function 'int dfs(int, int)':
doll.cpp:10:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  if(num+(1<<dep)>=K.size()){
      |     ~~~~~~~~~~~~^~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:28:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |   if(K.size()<(1<<i)){
      |      ~~~~~~~~^~~~~~~
doll.cpp:29:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |    while(K.size()<(1<<i)){
      |          ~~~~~~~~^~~~~~~
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:71:21: error: request for member 'size' in 'X.std::vector<int>::operator[](((std::vector<int>::size_type)i))', which is of non-class type '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'}
   71 |   assert(-(int)X[i].size()<=i&&i<=M);
      |                     ^~~~