PRoblem Description

Input

Output

Example Input

23 11 23 23 21 2
Example Output
21
#include<stdio.h>#include<string.h>int a[30];void init(int n){    int i;    for(i=1;i<=n;i++)    {        a[i]=i;    }}int f(int x){    int i,j;    i=x;    while(a[x]!=x)    {        x=a[x];    }    while(a[i]!=x)    {        j=a[i];        a[i]=x;        i=j;    }    return x;}void merge(int u,int v){    int x,y;    x=f(u);    y=f(v);    if(x!=y)    {        a[x]=y;    }}int main(){    int i,t,n,m,u,v,count;    scanf("%d",&t);    while(t--)    {        scanf("%d%d",&n,&m);        count=0;        init(n);        while(m--)        {            scanf("%d%d",&u,&v);            merge(u,v);        }        for(i=1;i<=n;i++)        {            if(a[i]==i)            {                count++;            }        }        printf("%d/n",count);    }    return 0;}