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#include<bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define mp make_pair
using namespace std;
inline int _in(){
	char t = getchar(); int o=0,f=0;
	while(t>47&&t<58)o=o*10+t-48,t=getchar();
	return f?-o:o;
}
typedef pair<int, int> pii;
int cn[11],d[11],t;
long long ans[25];
long long C[25][25];
 
int main(){
	long long n;
	cin >>n;
	while(n){
		if(!cn[n%10])t++;
		cn[n%10]++;
		n/=10;
	}
	C[0][0] = 1;
	for(int i = 1; i <= 20; i++){
		for(int j = 0 j <= i; j++){
			ll c=1;
			for(int k = i; k >= i-j+1; k--) c*=k;
			for(int k = l; k <= j; k++) c/=k;
			C[i][j] = c;
		}
	}
	for(int a = 0; a <= cn[0]; a++)
	for(int b = 0; b <= cn[1]; b++)
	for(int c = 0; c <= cn[2]; c++)
	for(int d = 0; d <= cn[3]; d++)
	for(int e = 0; e <= cn[4]; e++)
	for(int f = 0; f <= cn[5]; f++)
	for(int g = 0; g <= cn[6]; g++)
	for(int h = 0; h <= cn[7]; h++)
	for(int i = 0; i <= cn[8]; i++)
	for(int j = 0; j <= cn[9]; j++){
	    if(cn[0]&&!a) continue; 
	    if(cn[1]&&!b) continue; 
	    if(cn[2]&&!c) continue; 
	    if(cn[3]&&!d) continue; 
	    if(cn[4]&&!e) continue; 
	    if(cn[5]&&!f) continue; 
	    if(cn[6]&&!g) continue; 
	    if(cn[7]&&!h) continue; 
	    if(cn[8]&&!i) continue; 
	    if(cn[9]&&!j) continue;
 
	int t = a+b+c+d+e+f+g+h+i+j, s=t;
	long long m=1;
	if(a){
		m *= C[t-1][a]; t-=a;
	}
	m *= C[t][b]; t-=b;
	m *= C[t][c]; t-=c;
	m *= C[t][d]; t-=d;
	m *= C[t][e]; t-=e;
	m *= C[t][f]; t-=f;
	m *= C[t][g]; t-=g;
	m *= C[t][h]; t-=h;
	m *= C[t][i]; t-=i;
	m *= C[t][j]; t-=j;
	ans[s] += m;
       }
       for(int i = 0; i<21; i++)ans[0] += ans[i];
       cout<<ans[0];
}

prog.cpp:7:1: error: ‘ll’ does not name a type
 ll ans[25];
 ^~
prog.cpp:8:1: error: ‘ll’ does not name a type
 ll C[25][25];
 ^~
prog.cpp: In function ‘int main()’:
prog.cpp:10:2: error: ‘ll’ was not declared in this scope
  ll n;
  ^~
prog.cpp:11:2: error: ‘cin’ was not declared in this scope
  cin >>n;
  ^~~
prog.cpp:11:2: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:75:0,
                 from prog.cpp:1:
/usr/include/c++/6/iostream:60:18: note:   ‘std::cin’
   extern istream cin;  /// Linked to standard input
                  ^~~
prog.cpp:11:8: error: ‘n’ was not declared in this scope
  cin >>n;
        ^
prog.cpp:17:2: error: ‘C’ was not declared in this scope
  C[0][0] = 1;
  ^
prog.cpp:19:17: error: expected ‘;’ before ‘j’
   for(int j = 0 j <= i; j++){
                 ^
prog.cpp:20:7: error: expected ‘;’ before ‘c’
    ll c=1;
       ^
prog.cpp:21:36: error: ‘c’ was not declared in this scope
    for(int k = i; k >= i-j+1; k--) c*=k;
                                    ^
prog.cpp:22:16: error: ‘l’ was not declared in this scope
    for(int k = l; k <= j; k++) c/=k;
                ^
prog.cpp:22:32: error: ‘c’ was not declared in this scope
    for(int k = l; k <= j; k++) c/=k;
                                ^
prog.cpp:23:14: error: ‘c’ was not declared in this scope
    C[i][j] = c;
              ^
prog.cpp:48:5: error: expected ‘;’ before ‘m’
  ll m=1;
     ^
prog.cpp:50:3: error: ‘m’ was not declared in this scope
   m *= C[t-1][a]; t-=a;
   ^
prog.cpp:52:2: error: ‘m’ was not declared in this scope
  m *= C[t][b]; t-=b;
  ^
prog.cpp:61:2: error: ‘ans’ was not declared in this scope
  ans[s] += m;
  ^~~
prog.cpp:63:33: error: ‘ans’ was not declared in this scope
        for(int i = 0; i<21; i++)ans[0] += ans[i];
                                 ^~~
prog.cpp:64:8: error: ‘cout’ was not declared in this scope
        cout<<ans[0];
        ^~~~
prog.cpp:64:8: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:75:0,
                 from prog.cpp:1:
/usr/include/c++/6/iostream:61:18: note:   ‘std::cout’
   extern ostream cout;  /// Linked to standard output
                  ^~~~
prog.cpp:64:14: error: ‘ans’ was not declared in this scope
        cout<<ans[0];
              ^~~

Standard output is empty