delete pics to save space

1.3367.cpp

@@ -0,0 +1,52 @@
+#include<cstdio>
+template<typename T> inline void read(T& t)
+{
+    t=0; bool f=false; char ch;
+    while(ch=getchar(),!((ch>='0'&&ch<='9')||ch=='-'));
+    if(ch=='-') f=true,ch=getchar();
+    t=ch-'0';
+    while(ch=getchar(),ch>='0'&&ch<='9') t=t*10+ch-'0';
+    if(f) t=-t;
+}
+template<typename T,typename... Args> inline void read(T& t,Args&... args) { read(t); read(args...); }
+const int maxn=10005;
+int n,m;
+int fa[maxn],dep[maxn];
+inline int ff(int x)
+{
+	int a=x,b;
+	while(x!=fa[x]) x=fa[x];
+	while(a!=x)
+	{
+		b=fa[a];
+		fa[a]=x;
+		a=b;
+	}
+	return x;
+}
+inline void Union(int x,int y)
+{
+	int fx=ff(x),fy=ff(y); if(fx==fy) return;
+	if(dep[fx]<dep[fy]) fa[fx]=fy;
+	else
+	{
+		fa[fy]=fx;
+		if(dep[fx]==dep[fy]) dep[fx]++;
+	}
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	read(n,m);
+	for(int i=1;i<=n;i++) fa[i]=i;
+	int opt,x,y;
+	while(m-->0)
+	{
+		read(opt,x,y);
+		if(opt==1) Union(x,y);
+		else puts(ff(x)==ff(y)?"Y":"N");
+	}
+	return 0;
+}