1012

#include <stdio.h>
#define M 59

int n,m,k,s[M][M],chk[M][M],x[4]={-1,1,0,0},y[4]={0,0,1,-1};
void dfs(int a,int b){
	chk[a][b]=1;
	for (int i=0;i<4;i++) if (s[a+x[i]][b+y[i]] && !chk[a+x[i]][b+y[i]])
		dfs(a+x[i], b+y[i]);
}
int main(){
	int T; scanf("%d",&T); while(T--) {
		int i,j;
		scanf("%d %d %d",&n,&m,&k);
		for (i=0;i<=n+1;i++) for (j=0;j<=m+1;j++){
			s[i][j]=0;
			chk[i][j]=0;
		}
		for (i=1;i<=k;i++){
			int a,b;
			scanf("%d %d",&a,&b);
			s[a+1][b+1]=1;
		}
		int cnt=0;
		for (i=1;i<=n;i++) for (j=1;j<=m;j++) if (s[i][j] && !chk[i][j]){
			dfs(i,j);
			cnt++;
		}
		printf("%d\n",cnt);
	}
}