> #include <stdio.h>
> #include <iostream>
> using namespace std;
> char cs[1001];//unknown,equal,light,heavy
> int w[10001];
> bool w_cs[1001];
> int main(){
>     int c_num;
>     scanf ("%d",&c_num);
>     for(int i=0;i<=c_num;i++){
>         cs[i]='u';
>     }
>     int w_num;
>     scanf ("%d",&w_num);
>     for(int i = 0;i<w_num;i++){
>         int num_side;
>         scanf ("%d",&num_side);
>         memset(w_cs,false,sizeof(w_cs));
>         for(int i=1;i<=num_side*2;i++){
>             int c;
>             scanf ("%d",&c);
>             w[i]=c;
>             w_cs[c]=true;
>         }
>         char res;
>         cin>>res;
>         if(res=='<' || res=='>'){
>             int light_begin,ligth_end,heavy_begin,heavy_end;
>             if(res=='<'){
>                 light_begin=1;ligth_end=num_side;
>                 heavy_begin=num_side+1;heavy_end=num_side*2;
>             }else{
>                 light_begin=num_side+1;ligth_end=num_side*2;
>                 heavy_begin=1;heavy_end=num_side;
>             }
>             //light
>             for(int i=light_begin;i<=ligth_end;i++){
>                 int c = w[i];
>                 char old = cs[c];
>                 if(old=='u'){
>                     cs[c]='l';
>                 }else if(old=='e'){
>                 }else if(old=='l'){
>                 }else{//h
>                     cs[c]='e';
>                 }
>             }
>             //heavy
>             for(int i=heavy_begin;i<=heavy_end;i++){
>                 int c = w[i];
>                 char old = cs[c];
>                 if(old=='u'){
>                     cs[c]='h';
>                 }else if(old=='e'){
>                 }else if(old=='l'){
>                     cs[c]='e';
>                 }else{//h
>                 }
>             }
>             for(int n=1;n<=c_num;n++){
>                 if(!w_cs[n]){
>                     cs[n]='e';
>                 }
>             }
>         }else{//=
>             for(int i=1;i<=num_side*2;i++){
>                 int c = w[i];
>                 cs[c]='e';
>             }
>         }
>     }
>     int fcn=0;
>     int fc=0;
>     for(int i=1;i<=c_num;i++){
>         if(cs[i]!='e'){
>             fcn++;
>             fc=i;
>         }
>         if(fcn > 1){
>             fc=0;
>             break;
>         }
> 
>     }
>     printf("%d",fc);
> 
>     return 0;
> }
>