Submission #841625

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
841625	2023-09-01T18:49:08 Z	Pajaraja	Longest Trip (IOI23_longesttrip)	C++17	Compilation error	0 ms	0 KB

longesttrip

#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
int broj;
pair<int,int> findedge(vector<int> a,vector<int> b)
{
    int l=0,r=b.size()-1;
    while(l!=r)
    {
        int s=(l+r)/2;
        vector<int> q;
        for(int i=l;i<=s;i++) q.push_back(b[i]);
        if(are_connected(a,q)) r=s;
        else l=s+1;
    }
    int ind=l;
    vector<int> d;
    d.push_back(b[l]);
    l=0; r=a.size()-1;
    while(l!=r)
    {
        int s=(l+r)/2;
        vector<int> q;
        for(int i=l;i<=s;i++) q.push_back(a[i]);
        if(are_connected(q,d)) r=s;
        else l=s+1;
    }
    return {l,ind};
}
mt19937 rng(time(0));
bool ask(int a,int b)
{
    broj++;
    vector<int> a1,b1;
    a1.push_back(a);
    b1.push_back(b);
    return are_connected(a1,b1);
}
std::vector<int> longest_trip(int N, int D)
{
    broj=0;
    vector<int> cur1,cur2;
    vector<int> all;
    for(int i=0;i<N;i++) all.push_back(i);
    shuffle(all.begin(),all.end(),rng);
    cur1.push_back(all[0]);
    bool nema=true;
    for(int i=1;i<N;i++)
    {
        int x=all[i];
        if(ask(cur1.back(),x))
        {
            cur1.push_back(x);
            nema=false;
            if(cur2.size()==0) nema=true;
        }
        else
        {
            if(nema) cur2.push_back(x);
            else
            {
                if(!ask(cur2.back(),x))
                {
                    if(cur2.size()==1) nema=true;
                    else if(!ask(cur2[0],x)) nema=true;
                    for(int i=cur2.size()-1;i>=0;i--) cur1.push_back(cur2[i]);
                    cur2.clear();
                    if(nema)  cur2.push_back(x);
                    else cur1.push_back(x);
                    nema=true;
                }
                else
                {
                    cur2.push_back(x);
                    nema=true;
                }
            }
        }
    }
    if(!are_connected(cur1,cur2))
    {
        if(cur1.size()<cur2.size()) return cur2;
        return cur1;
    }
    if(cur1.size()<cur2.size()) swap(cur1,cur2);
    if(cur2.size()==0) return cur1;
    if(cur2.size()==1)
    {
        if(are_connected(cur1.back(),cur2.back()))
        {
            cur1.push_back(cur2.back());
            return cur1;
        }
        pair<int,int> p=findedge(cur1,cur2);
        vector<int> ans;
        ans.push_back(cur2[0]);
        int c=p.first;
        do{
            ans.push_back(cur1[c]);
            c++;
            c%=cur1.size();
        } while(c!=p.first);
    }
    int al=cur1[0],ar=cur.back(),bl=cur2[0],br=cur2.back();
    if(are_connected({{al,ar},{bl,br}))
    {
        vector<int> ans;
        if(are_connected(al,bl))
        {
            reverse(cur1.begin(),cur1.end());
            for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
            for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
        }
        if(are_connected(al,br))
        {
            reverse(cur1.begin(),cur1.end());
            reverse(cur2.begin(),cur2.end());
            for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
            for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
        }
        if(are_connected(ar,bl))
        {
            for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
            for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
        }
        if(are_connected(ar,br))
        {
            reverse(cur2.begin(),cur2.end());
            for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
            for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
        }
        return ans;
    }
    pair<int,int> p=findedge(cur1,cur2);
    vector<int> ans;
    int c=p.second;
    do
    {
        c++;
        c%=cur2.size();
        ans.push_back(cur2[c]);
    } while(c!=p.second)
    int c=p.first;
    do
    {
        ans.push_back(cur1[c]);
        c++;
        c%=cur1.size();
    } while(c!=p.first)
    return ans;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:89:35: error: could not convert 'cur1.std::vector<int>::back()' from '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} to 'std::vector<int>'
   89 |         if(are_connected(cur1.back(),cur2.back()))
      |                          ~~~~~~~~~^~
      |                                   |
      |                                   __gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type {aka int}
longesttrip.cpp:104:23: error: 'cur' was not declared in this scope; did you mean 'cur2'?
  104 |     int al=cur1[0],ar=cur.back(),bl=cur2[0],br=cur2.back();
      |                       ^~~
      |                       cur2
longesttrip.cpp:105:32: error: 'bl' was not declared in this scope; did you mean 'al'?
  105 |     if(are_connected({{al,ar},{bl,br}))
      |                                ^~
      |                                al
longesttrip.cpp:105:35: error: 'br' was not declared in this scope; did you mean 'ar'?
  105 |     if(are_connected({{al,ar},{bl,br}))
      |                                   ^~
      |                                   ar
longesttrip.cpp:105:38: error: expected '}' before ')' token
  105 |     if(are_connected({{al,ar},{bl,br}))
      |                      ~               ^
longesttrip.cpp:105:38: error: could not convert '{{al, ar}, {<expression error>, <expression error>}}' from '<brace-enclosed initializer list>' to 'std::vector<int>'
longesttrip.cpp:111:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  111 |             for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:112:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  112 |             for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:118:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |             for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:119:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  119 |             for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:123:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  123 |             for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:124:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |             for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:129:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  129 |             for(int i=0;i<cur1.size();i++) ans.push_back(cur1[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:130:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  130 |             for(int i=0;i<cur2.size();i++) ans.push_back(cur2[i]);
      |                         ~^~~~~~~~~~~~
longesttrip.cpp:142:25: error: expected ';' before 'int'
  142 |     } while(c!=p.second)
      |                         ^
      |                         ;
  143 |     int c=p.first;
      |     ~~~                  
longesttrip.cpp:143:9: error: redeclaration of 'int c'
  143 |     int c=p.first;
      |         ^
longesttrip.cpp:136:9: note: 'int c' previously declared here
  136 |     int c=p.second;
      |         ^
longesttrip.cpp:149:24: error: expected ';' before 'return'
  149 |     } while(c!=p.first)
      |                        ^
      |                        ;
  150 |     return ans;
      |     ~~~~~~