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AC Code~~~~C++#include<stdio.h>
#include<cstring>
#include<algorithm>
using namespace std;
const int maxl=10001;
const int maxn=8200;
struct Pla{
char str[maxl];
bool ope[maxn];
int N,step,l;
int dp(int i,int out){
if(i*2>N){
if(ope[i]==0&&out==1)return 1;
if(ope[i]==1&&out==1)return 2;
return 0;
}
if(out!=1)return 0;
else if(ope[i]==1)return dp(i<<1,1)+dp(i<<1|1,1);
else return min(dp(i<<1,1)+dp(i<<1|1,0),dp(i<<1,0)+dp(i<<1|1,1));
}
void init(){
scanf("%d",&N);N--;
scanf("%s",str);
for(int i=1;i<=N;i++)scanf("%d",&ope[i]);
step=dp(1,1);l=strlen(str);
}
void work(){
int ret=0,now=0;
for(int i=0;i<l;i++)
if(str[i]-'0'!=now){
now=str[i]-'0';
ret++;
}
if(ret)ret+=step;
printf("%d\n",ret-1);
}
}sol;
int main(){
int T;
scanf("%d",&T);
while(T--){
sol.init();
sol.work();
}
return 0;
}
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