void abort() { };

                                                                       
                                                  
                                                                             
                                                                   
                                                  
                                                                             
                                                                              
                                                                             

                                                                                                                                                               
                        
void assume_abort_if_not(int cond) {
  if(!cond) {abort();}
}
/*@ 
    requires ((1 <= cond)) && (cond != 0);
    ensures ((1 <= cond)) && (1);
@*/
void __VERIFIER_assert(int cond) {
  if (!(cond)) {
    ERROR: {/*@ assert(0); */;abort();}
  }
  return;
}
int __VERIFIER_nondet_int();
int main(int argc, char* argv[]) {
  int c1 = 4000;
  int c2 = 2000;
  int c3 = 10000;
  int n, v;
  int i, k, j;
  n = __VERIFIER_nondet_int();
  if (!(0 <= n && n < 10)) return 0;
  k = 0;
  i = 0;
/*@
loop invariant (((((((10000 <= c3) && (k == 0)) && (4000 <= c1)) && (i == 0)) && (2000 <= c2)) || ((((((10000 <= c3) && (2000 <= k)) && (4000 <= c1)) && (n <= 1)) && (2000 <= c2)) && (1 <= i))));
@*/
  while( i < n ) {
    i++;
    v = __VERIFIER_nondet_int();
    if (!(0 <= v && n < 2)) return 0;
    if( v == 0 )
      k += c1;
    else if( v == 1 )
      k += c2;
    else
      k += c3;
  }
  j = 0;
/*@
loop invariant (((((j == 0) && (n <= 0)) || ((((((10000 <= c3) && (0 <= j)) && (2000 <= k)) && (4000 <= c1)) && (n <= 1)) && (2000 <= c2))) || ((((((10000 <= c3) && (1 <= k)) && (1 <= j)) && (4000 <= c1)) && (n <= 1)) && (2000 <= c2))));
@*/
  while( j < n ) {
    __VERIFIER_assert(k > 0);
    j++;
    k--;
  }
  return 0;
}