/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:21:14: error: 'struct patoulaoge' has no member named 'y'; did you mean 'y1'?
   if(a[b][c].y
              ^
/in/foo.cc:22:3: error: expected ')' before numeric constant
   1==1) d++;
   ^
/in/foo.cc:17:10: warning: unused variable 'e' [-Wunused-variable]
  int d=0,e=a[b][c].y2;
          ^