Marx2002 2016-08-16 19:07:20
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var n,m,p,i,x,y,z,j:longint;
f:array [1..10000] of longint;
begin
readln(n,m,p);
for i:=1 to n do
f[i]:=i;
for i:=1 to m do
begin
read(x,y);
z:=f[x];
for j:=1 to n do
if f[j]=z then f[j]:=f[y];
end;
for i:=1 to p do
begin
read(x,y);
if f[x]=f[y] then writeln('Yes') else writeln('No');
end;
end.