染色 + 特殊的背包 DP
//============================================================================
// Name : The Joys of Farming.cpp
// Date : 2013/4/27 下午12:20:56
// Author : GCA
//============================================================================
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <climits>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <cctype>
#include <utility>
using namespace std;
#ifdef ONLINE\_JUDGE
#define ll "%lld"
#else
#define ll "%I64d"
#endif
typedef unsigned int uint;
typedef long long int Int;
#define Set(a,s) memset(a,s,sizeof(a))
#define Write(w) freopen(w,"w",stdout)
#define Read(r) freopen(r,"r",stdin)
#define Pln() printf("\\n")
#define I\_de(x,n)for(int i=0;i<n;i++)printf("%d ",x\[i\]);Pln()
#define De(x)printf(#x"%d\\n",x)
#define For(i,x)for(int i=0;i<x;i++)
#define CON(x,y) x##y
#define Pmz(dp,nx,ny)for(int hty=0;hty<ny;hty++){for(int htx=0;htx<nx;htx++){\\
printf("%d ",dp\[htx\]\[hty\]);}Pln();}
#define M 2010
#define PII pair<int,int\>
#define PB push\_back
#define oo INT\_MAX
#define Set\_oo 0x3f
#define Is\_debug true
#define debug(...) if(Is\_debug)printf("DEBUG: "),printf(\_\_VA\_ARGS\_\_)
#define FOR(it,c) for(\_\_typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define eps 1e-6
bool xdy(double x,double y){return x>y+eps;}
bool xddy(double x,double y){return x>y-eps;}
bool xcy(double x,double y){return x<y-eps;}
bool xcdy(double x,double y){return x<y+eps;}
int min3(int x,int y,int z){
int tmp=min(x,y);
return min(tmp,z);
}
int max3(int x,int y,int z){
int tmp=max(x,y);
return max(tmp,z);
}
int b,c,a;
int mz\[M\]\[M\];
int mzsize\[M\];
int used\[M\];
int q\[M\*M\],front,rear;
int white,black,no;
int coinw\[M\];
int coinb\[M\];
int dp\[M\];
int next\[M\];
void bfs(int x){
front=rear=0;
q\[front++\]=x;
used\[x\]=0;
while(front>rear){
int u=q\[rear++\];
int nowcolor=used\[u\];
if(nowcolor)black++;
else white++;
for(int i=0;i<mzsize\[u\];i++){
int v=mz\[u\]\[i\];
if(used\[v\]==nowcolor){
no=1;
return;
}else if(used\[v\]==-1){
used\[v\]=1-nowcolor;
q\[front++\]=v;
}
}
}
}
int main() {
ios\_base::sync\_with\_stdio(0);
int test;
scanf("%d",&test);
while(test--){
no=0;
Set(mz,0);
Set(mzsize,0);
Set(used,-1);
Set(coinw,0);
Set(coinb,0);
Set(dp,0);
scanf("%d%d%d",&b,&c,&a);
for(int i=0;i<a;i++){
int x,y;
scanf("%d%d",&x,&y);
mz\[x\]\[mzsize\[x\]++\]=y;
mz\[y\]\[mzsize\[y\]++\]=x;
}
int k=0;
for(int i=1;i<=b+c;i++){
if(used\[i\]==-1){
white=black=0;
bfs(i);
coinw\[k\]=white;
coinb\[k++\]=black;
// debug("%d %d\\n",coinw\[k-1\],coinb\[k-1\]);
}
}
if(no){
printf("no\\n");
continue;
}
Set(next,0);
dp\[0\]=1;
for(int i=0;i<k;i++){
Set(next,0);
for(int j=b;j>=min(coinb\[i\],coinw\[i\]);j--){
if(j>=coinw\[i\]){
next\[j\]|=dp\[j-coinw\[i\]\];
// printf("dp\[%d\]=dp\[%d\]\\n",j,j-coinw\[i\]);
}
if(j>=coinb\[i\]){
next\[j\]|=dp\[j-coinb\[i\]\];
// printf("dp\[%d\]=dp\[%d\]\\n",j,j-coinb\[i\]);
}
}
for(int i=0;i<=b;i++)dp\[i\]=next\[i\];
}
// for(int i=0;i<=b;i++){
// printf("%d ",dp\[i\]);
// }Pln();
if(dp\[b\])printf("yes\\n");
else printf("no\\n");
}
}