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Cod sursa(job #664458)
#include<cstdio>
#include<iostream>
#include<ctime>
#include<cstdlib>
#include<fstream>
using namespace std;
int root[100000+10];
int find(int x)
{
int r = x;
while(root[r]!=r)
r=root[r];
//compresia drumurilor
while(root[x]!=x)
{
int tmp;
tmp=root[x];
root[x]=r;
x=tmp;
}
return r;
}
void join(int x, int y)
{
//unim radacinile
x=find(x);
y=find(y);
if(rand()%2)
root[y]=x;
else
root[x]=y;
}
bool check(int x, int y)
{
return find(x) == find(y);
}
int main()
{
fstream f("disjoint.in",ios::in);
fstream g("disjoint.out",ios::out);
srand(time(0));
int n,m;
f>>n>>m;
for(int i=1;i<=n;++i)
root[i]=i;
for(;m;--m)
{
int type,x,y;
f>>type>>x>>y;
if(type == 1)
{
join(x,y);
// for(int i=1;i<=n;++i)
// cerr<<root[i]<<' ';
}
else
{
g<<(check(x,y)?"DA":"NU")<<'\n';
}
}
return 0;
}