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Cod sursa(job #390432)
#include<stdio.h>
int n,q,t[100021],r[100021],i,j,w,e;
void lipesc(int x,int y)
{ if(r[x]>r[y])
t[y]=x;
else
t[x]=y;
if(r[x]==r[y])
r[y]++;
}
int gasesc(int x)
{ int p=x,m,l=x;
while(t[l]!=l)
l=t[l];
while(t[p]!=p)
{ m=t[p];
t[p]=l;
p=m;
}
return l;
}
int main()
{ freopen("disjoint.in","r",stdin);
freopen("disjoint.out","w",stdout);
scanf("%d%d",&n,&q);
for(i=1;i<=n;i++)
{t[i]=i;
r[i]=1;
}
for(int u=1;u<=q;u++)
{ scanf("%d%d%d",&w,&e,&j);
if(w==1)
lipesc(gasesc(e),gasesc(j));
else if(gasesc(e)==gasesc(j))
printf("DA\n");
else printf("NU\n");
}
return 0;}