hud 1022 栈的应用

#include
#include
using namespace std;
int main()
{
    int n;
    char stra[1010],strb[1010];
    stack  s;
    int a,b,t;
    int way[1010];
    while (scanf("%d%s%s",&n,stra,strb)!=EOF)
    {
          while(!s.empty()) s.pop();
          a=b=t=0;
          while (b