This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define fi first
#define se second
using namespace std;
int n,m;
const int N=400006;
vector<short int>v[N];
short int pa[N],co[N];
int go (int x,int y)
{
int re=x-1;
re*=m;
re+=y;return re;
}
int get (int x)
{
if(pa[x]==x)return x;
return pa[x]=get(pa[x]);
}
void merge(int x,int y)
{
x=get(x);
y=get(y);
if(x==y)return;
if(v[x].size()<v[y].size())swap(x,y);
for(auto it:v[y])
{
int o=get(it);
if(o==x)continue;
v[x].pb(o);
}
pa[y]=x;
}
int main()
{
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n>>m;
int r=0;
for(int i=1;i<=n;i++)
{
for(int j=1;j<m+1;j++)
{
int x=go(i,j);
cin>>co[x];
pa[x]=x;
int u=x,uu=go(i-1,j),uuu=go(i,j-1);
if(i>1)
{
if(co[u]==co[uu])
{
merge(u,uu);
}
else {v[u].pb(uu);
v[uu].pb(u);}
}
if(j>1)
{
if(co[u]==co[uuu])
{
merge(u,uuu);
}
else {v[u].pb(uuu);
v[uuu].pb(u);}
}
}
}
int q;cin>>q;
while(q--)
{
int x,y,c;
cin>>x>>y>>c;
int u=go(x,y);
int w=get(u);
if(c==co[w])continue;
co[w]=1-co[w];
for(auto it:v[u])
{
int t=get(it);
if(t==w)continue;
merge(t,w);
w=get(w);
}
}
for(int i=1;i<n+1;i++)
{
for(int j=1;j<m+1;j++)cout<<co[get(go(i,j))]<<" ";
cout<<endl;
}
}
Compilation message (stderr)
paint.cpp: In function 'int main()':
paint.cpp:40:9: warning: unused variable 'r' [-Wunused-variable]
40 | int r=0;
| ^
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