#include #include #include using namespace std; int main() { int can[10]={1,1,1,1,1,1,1,1,1,1},a,b; bool change[10][10]={0},use[10]={0}; int queue[15]; int head=0,tail=0; string num; cin>>num; int k; cin>>k; for(int i=0;i>a>>b; change[a][b]=1; } for(int i=0;i<10;i++) { tail=head=0; queue[tail++]=i; memset(use,0,sizeof(use)); use[i]=1; while(tail-head>0) { for(int j=0;j<10;j++) { if(change[queue[head]][j]&&!use[j]) { queue[tail++]=j; use[j]=1; } } head++; } can[i]=tail; } int ans=1; for(int i=0;i