/in/foo.cc: In function 'int main()':
/in/foo.cc:7:42: warning: unused variable 'c' [-Wunused-variable]
  int n,s,f,b,d,total,t,x1,x2,du,max,time,c,i;
                                          ^
/in/foo.cc:35:13: warning: 'total' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<total;
             ^