/in/foo.cc: In function 'int main()':
/in/foo.cc:17:50: warning: format '%lld' expects argument of type 'long long int*', but argument 2 has type 'int*' [-Wformat=]
  fo(i,1,n) scanf("%lld%lld%lld",&x[i],&y[i],&r[i]);
                                                  ^
/in/foo.cc:17:50: warning: format '%lld' expects argument of type 'long long int*', but argument 3 has type 'int*' [-Wformat=]
/in/foo.cc:17:50: warning: format '%lld' expects argument of type 'long long int*', but argument 4 has type 'int*' [-Wformat=]