/in/foo.cc: In function 'void select(int, int)':
/in/foo.cc:26:33: warning: unused variable 'w2' [-Wunused-variable]
  unsigned long long w1=sum[p-1],w2=sum[i]-sum[p];
                                 ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:48:59: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long unsigned int*' [-Wformat=]
  while(scanf("%d%d%s",&cou[i].wei,&cou[i].dis,&cou[i].name)!=EOF)
                       ~~~~~~~~~~~                         ^
/in/foo.cc:48:59: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'long long unsigned int*' [-Wformat=]
/in/foo.cc:48:59: warning: format '%s' expects argument of type 'char*', but argument 4 has type 'char (*)[110000]' [-Wformat=]