answer.code: In function ‘bool spfa()’:
answer.code:80:30: error: expected ‘;’ before ‘}’ token
   80 |     if (dis[T]==inf) return 0}
      |                              ^
      |                              ;
answer.code:80:30: warning: control reaches end of non-void function [-Wreturn-type]
   80 |     if (dis[T]==inf) return 0}
      |                              ^