Submission #1341007

#	Time	Username	Problem	Language	Result	Execution time	Memory
1341007		fatuu27	Cats or Dogs (JOI18_catdog)	C++20	Compilation error	0 ms	0 KiB

catdog

#include <iostream>
#include <vector>
#include <algorithm>
#define fi first
#define se second

using namespace std;
int n;
int idx;
vector<int> G,nxt,top,A;
void add_edge(int x,int y)
{
    idx++;
    G[idx]=y;
    nxt[idx]=top[x];
    top[x]=idx;
}
void initialize(int _n,vector<int> a[],vector<int> b[])
{
    n=_n;
    G=nxt=vector<int>(2*n+1);
    top=A=vector<int>(n+1);
    for(int i=1;i<=n-1;i++)
    {
        add_edge(a[i-1],b[i-1]);
        add_edge(b[i-1],a[i-1]);
    }
}
pair<int,int> dfs(int x,int tata)
{
    pair<int,int> ans;
    ans={0,0};
    for(int i=top[x];i;i=nxt[i])
    {
        int y=G[i];
        if(y==tata)
            continue;
        auto [cs,ds]=dfs(y,x);
        ans.fi=min(cs,ds+1);
        ans.se=min(ds,cs+1);
    }
    if(A[x]==1)
        ans.se=2e9;
    if(A[x]==2)
        ans.fi=2e9;
    return ans;
}
int cat(int x)
{
    A[x]=1;
    auto [c,d]=dfs(1,0);
    return min(c,d);
}
int dog(int x)
{
    A[x]=2;
    auto [c,d]=dfs(1,0);
    return min(c,d);
}
int neighbor(int x)
{
    A[x]=0;
    auto [c,d]=dfs(1,0);
    return min(c,d);
}

/*int main()
{

    return 0;
}*/

Compilation message (stderr)

catdog.cpp: In function 'void initialize(int, std::vector<int>*, std::vector<int>*)':
catdog.cpp:25:23: error: cannot convert 'std::vector<int>' to 'int'
   25 |         add_edge(a[i-1],b[i-1]);
      |                  ~~~~~^
      |                       |
      |                       std::vector<int>
catdog.cpp:11:19: note:   initializing argument 1 of 'void add_edge(int, int)'
   11 | void add_edge(int x,int y)
      |               ~~~~^
catdog.cpp:26:23: error: cannot convert 'std::vector<int>' to 'int'
   26 |         add_edge(b[i-1],a[i-1]);
      |                  ~~~~~^
      |                       |
      |                       std::vector<int>
catdog.cpp:11:19: note:   initializing argument 1 of 'void add_edge(int, int)'
   11 | void add_edge(int x,int y)
      |               ~~~~^