Submission #370013

#	Time	Username	Problem	Language	Result	Execution time	Memory
370013		iliccmarko	Connecting Supertrees (IOI20_supertrees)	C++14	Compilation error	0 ms	0 KiB

supertrees

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl "\n"
#define INF 1000000000
#define LINF 1000000000000000LL
#define pb push_back
#define all(x) x.begin(), x.end()
#define len(s) (int)s.size()
#define test_case { int t; cin>>t; while(t--)solve(); }
#define single_case solve();
#define line cerr<<"----------"<<endl;
#define ios { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); cerr.tie(NULL); }
#define mod 1000000007LL
const int N = 1050;
vector<int> g[N];
int n;
int s[N], parent[N];
int grupa[N];
vector<vector<int> > b(N, vector<int>(N, 0));


void build(vector<vector<int> > b)
{
    for(int i = 0;i<n;i++)
    {
        for(int x : g[i])
            b[i][x] = 1;
    }
}


int find_parent(int u)
{
    while(parent[u]!=u)
    {
        parent[u] = parent[parent[u]];
        u = parent[u];
    }
    return u;
}

void dsu(int u, int v)
{
    u = find_parent(u);
    v = find_parent(v);
    if(u!=v)
    {
        if(s[u]<s[v]) swap(u, v);
        s[u] += s[v];
        parent[v] = u;
    }
}


int construct(vector<vector<int> > p)
{
    n = len(p);
    for(int i = 0;i<n;i++)
    {
        for(int j = 0;j<n;j++)
        {
            if(i==j) continue;
            if(p[i][j]==3)
            {
                g[i].pb(j);
                grupa[i] = 3;
            }
        }
    }
    for(int i = 0;i<n;i++)
    {
        if(grupa[i]) continue;
        for(int j = 0;j<n;j++)
        {
            if(i==j) continue;
            if(grupa[j]) continue;
            if(p[i][j]==2)
            {
                grupa[i] = 2;
                g[i].pb(j);
            }
        }
    }
    for(int i = 0;i<n;i++)
    {
        if(grupa[i]) continue;
        for(int j = 0;j<n;j++)
        {
            if(i==j) continue;
            if(grupa[j]) continue;
            if(p[i][j]==1)
            {
                grupa[i] = 1;
                g[i].pb(j);
            }
        }
    }
    for(int i = 0;i<n;i++)
    {
        for(int x : g[i])
            dsu(i, x);
    }
    for(int i = 0;i<n;i++) parent[i] = find_parent(i);
    int moze = 1;
    for(int i = 0;i<n;++i)
    {
        int x = grupa[i];
        int cnt = 0;
        int raz = 0;
        for(int j = 0;j<n;j++)
        {
            if(i==j) continue;
            if(p[i][j]!=x) raz++;
            if(p[i][j]==x) cnt++;
        }
        if(raz) moze = 0;
        if(cnt!=s[parent[i]]) moze = 0;
    }
    if(!moze) return 0;
    build(b);
    return 1;
}

Compilation message (stderr)

/tmp/ccuPRGHs.o: In function `build(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)':
grader.cpp:(.text+0x1d0): multiple definition of `build(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)'
/tmp/ccdol2xo.o:supertrees.cpp:(.text+0x40): first defined here
collect2: error: ld returned 1 exit status