delete pics to save space

history_source/信息学奥赛一本通/3.4.5.1.cpp

@@ -0,0 +1,50 @@
+#include<cstdio>
+#include<cstring>
+int fa[1001],a[1001][1001],c[1001];
+int find(int x)
+{
+	int r;
+	r=x;
+	while (fa[r]!=r) r=fa[r];
+	return r;
+}
+int main()
+{
+	int n,m,s=0,i,j,k,x,y,z,r1,r2,t;
+	scanf("%d%d",&n,&m);
+	memset(a,0,sizeof(a));
+	for(i=1;i<=n;i++) fa[i]=i;
+	for(i=1;i<=m;i++)
+	{
+		scanf("%d%d%d",&z,&x,&y);
+		if(z==0)
+		{
+			r1=find(x);
+			r2=find(y);
+			fa[r2]=r1;
+		}
+		if(z==1)
+		{
+			for(j=1;j<=a[x][0];j++)
+			{
+				r1=find(y);
+				r2=find(a[x][j]);
+				fa[r2]=r1;
+			}
+			for(j=1;j<=a[y][0];j++)
+			{
+				r1=find(x);
+				r2=find(a[y][j]);
+				fa[r2]=r1;
+			}
+			a[x][0]++;
+			a[y][0]++;
+			a[x][a[x][0]]=y;
+			a[y][a[y][0]]=x;
+		}
+	}
+	s=0;
+	for(i=1;i<=n;i++) if(fa[i]==i) s++;
+	printf("%d\n",s);
+	return 0;
+}