/in/foo.cc:76:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  main() {
       ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:90:32: warning: format '%d' expects argument of type 'int', but argument 2 has type 'LL {aka long long int}' [-Wformat=]
  printf("%d",ans-Dinic(0,n+m+1));
              ~~~~~~~~~~~~~~~~~~^