Submission #286524

#	Time	Username	Problem	Language	Result	Execution time	Memory
286524		stoyan_malinin	장난감 기차 (IOI17_train)	C++14	Compilation error	0 ms	0 KiB

train

#include "train.h"
//#include "grader.cpp"

#include <vector>
#include <iostream>
#include <algorithm>
#include <functional>

using namespace std;

const int MAXN = 5005;

int n;
vector <int> adj[MAXN];
int owner[MAXN], charging[MAXN];

int guessSubtask(vector <int> a, vector <int> r, vector <int> u, vector <int> v)
{
    bool sub1 = true;
    for(int i = 0;i<u.size();i++)
    {
        if(u[i]!=v[i] && u[i]+1!=v[i])
        {
            sub1 = false;
            break;
        }
    }
    if(sub1==true) return 1;


}

vector <int> solve1()
{
    vector <int> res(n, -1);

    for(int s = 0;s<n;s++)
    {
        int x = s;
        while(true)
        {
            int goal = -1;
            if(owner[x]==1)
            {
                if(charging[x]==1) goal = x;
                else goal = x + 1;

                bool found = false;
                for(int y: adj[x])
                {
                    if(y==goal)
                    {
                        found =true;
                        break;
                    }
                }

                if(found==true)
                {
                    if(goal==x)
                    {
                        res[s] = true;
                        break;
                    }
                    else
                    {
                        x = x + 1;
                    }
                }
                else
                {
                    res[s] = false;
                    break;
                }
            }
            else
            {
                if(charging[x]==1) goal = x + 1;
                else goal = x;

                bool found = false;
                for(int y: adj[x])
                {
                    if(y==goal)
                    {
                        found =true;
                        break;
                    }
                }

                if(found==true)
                {
                    if(goal==x)
                    {
                        res[s] = false;
                        break;
                    }
                    else
                    {
                        x = x + 1;
                    }
                }
                else
                {
                    res[x] = true;
                    break;
                }
            }
        }
    }

    return res;
}

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v)
{
    n = a.size();
    for(int i = 0;i<n;i++)
    {
        owner[i] = a[i];
        charging[i] = r[i];
    }

    for(int i = 0;i<u.size();i++)
    {
        adj[ u[i] ].push_back(v[i]);
    }

    for(int i = 0;i<n;i++)
    {
        sort(adj[i].begin(), adj[i].end());
        auto it = unique(adj[i].begin(), adj[i].end());
        adj[i].resize(it-adj[i].begin());
    }

    int subtask = guessSubtask(a, r, u, v);
    if(subtask==1) return solve1();

    assert(false);
}

Compilation message (stderr)

train.cpp: In function 'int guessSubtask(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int i = 0;i<u.size();i++)
      |                   ~^~~~~~~~~
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:124:20: 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<u.size();i++)
      |                   ~^~~~~~~~~
train.cpp:139:5: error: 'assert' was not declared in this scope
  139 |     assert(false);
      |     ^~~~~~
train.cpp:8:1: note: 'assert' is defined in header '<cassert>'; did you forget to '#include <cassert>'?
    7 | #include <functional>
  +++ |+#include <cassert>
    8 | 
train.cpp: In function 'int guessSubtask(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:31:1: warning: control reaches end of non-void function [-Wreturn-type]
   31 | }
      | ^
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:140:1: warning: control reaches end of non-void function [-Wreturn-type]
  140 | }
      | ^