Submission #1282817

#	Time	Username	Problem	Language	Result	Execution time	Memory
1282817		MMihalev	Sphinx's Riddle (IOI24_sphinx)	C++20	Compilation error	0 ms	0 KiB

sphinx

#include<iostream>
#include<algorithm>
#include<vector>
#include<cmath>
#include "sphinx.h"
using namespace std;
vector<int>ans,exp;
int n;
bool check(vector<int>ids,int col)
{
    int cN=0;
    for(int i=0;i<ids[0];i++)
    {
        cN++;
        exp[i]=n;
    }
    for(int i=ids[0];i<=ids.back();i+=2)
    {
        exp[i]=-1;
        exp[i+1]=col;
    }
    for(int i=ids.back()+1;i<N;i++)
    {
        cN++;
        exp[i]=n;
    }

    int cnt=perform_experiment(exp);

    if(cnt<cN+ids.back()-ids[0]+1)return 1;
    return 0;
}
void rec(vector<int>ids,int col)
{
    if(ids.size()==1)
    {
        ans[ids[0]]=col;
        return;
    }

    int mid=ids.size()/2;

    vector<int>ids1,ids2;
    for(int i=0;i<ids.size();i++)
    {
        if(i<=mid)ids1.push_back(ids[i]);
        else ids2.push_back(ids[i]);
    }

    if(check(ids1,col))rec(ids1,col);
    else rec(ids2,col);
}
vector<int> find_colours(int N, std::vector<int> X, std::vector<int> Y)
{
    n=N;
    exp.resize(n);
    ans.resize(n);
    for(int i=0;i<n;i++)
    {
        ans[i]=-1;
    }

    vector<int>idseven,idsodd;
    for(int i=0;i<n;i++)
    {
        if(i%2==0)idseven.push_back(i);
        else idsodd.push_back(i);
    }

    for(int col=0;col<n;col++)
    {
        bool full=1;
        for(int id:idseven)
        {
            if(ans[id]==-1)full=0;
        }
        if(!full)
        {
            if(check(idseven,col))rec(idseven,col);
        }


        full=1;
        for(int id:idsodd)
        {
            if(ans[id]==-1)full=0;
        }
        if(!full)
        {
            if(check(idsodd,col))rec(idsodd,col);
        }
    }

    return ans;
}

Compilation message (stderr)

sphinx.cpp:7:16: error: 'std::vector<int> exp' redeclared as different kind of entity
    7 | vector<int>ans,exp;
      |                ^~~
In file included from /usr/include/features.h:502,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/c++config.h:679,
                 from /usr/include/c++/13/bits/requires_hosted.h:31,
                 from /usr/include/c++/13/iostream:38,
                 from sphinx.cpp:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:95:1: note: previous declaration 'double exp(double)'
   95 | __MATHCALL_VEC (exp,, (_Mdouble_ __x));
      | ^~~~~~~~~~~~~~
sphinx.cpp: In function 'bool check(std::vector<int>, int)':
sphinx.cpp:15:12: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   15 |         exp[i]=n;
      |            ^
sphinx.cpp:19:12: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   19 |         exp[i]=-1;
      |            ^
sphinx.cpp:20:12: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   20 |         exp[i+1]=col;
      |            ^
sphinx.cpp:22:30: error: 'N' was not declared in this scope
   22 |     for(int i=ids.back()+1;i<N;i++)
      |                              ^
sphinx.cpp:25:12: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   25 |         exp[i]=n;
      |            ^
sphinx.cpp:28:31: error: cannot resolve overloaded function 'exp' based on conversion to type 'std::vector<int>'
   28 |     int cnt=perform_experiment(exp);
      |             ~~~~~~~~~~~~~~~~~~^~~~~
sphinx.cpp: In function 'std::vector<int> find_colours(int, std::vector<int>, std::vector<int>)':
sphinx.cpp:56:9: error: overloaded function with no contextual type information
   56 |     exp.resize(n);
      |         ^~~~~~