-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcountperm.cpp
More file actions
56 lines (48 loc) · 964 Bytes
/
countperm.cpp
File metadata and controls
56 lines (48 loc) · 964 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
#include<iostream>
#include<stdio.h>
using namespace std;
#define lli long long int
lli fc[25];
int flag[100];
void fct(){
fc[0] = 1;
for(int i=1;i<21;i++) fc[i] = fc[i-1]*i;
//cout<<fc[20]<<endl;
}
int check(string s,char c){
int len = s.size();
int cnt = 0;
for(int i=0;i<len;i++){
if(!flag[i]&&s[i]!=c) cnt++;
if(s[i]==c){
flag[i] = 1;
return cnt;
}
}
}
lli can(string in,string out){
int l = out.size();
int p = l-1;
lli tot = 0;
for(int i=0;i<l;i++,p--){
tot = tot + check(in,out[i])*fc[p];
}
return tot;
}
void clr(int n){
for(int i=0;i<=n;i++) flag[i] = 0;
}
int main(){
freopen("out.txt","r",stdin);
freopen("int.txt","w",stdout);
string inti = "123456789";
string s;
lli hav;
fct();
while(cin>>s){
hav = can(inti,s);
int len = inti.size();
clr(len);
cout<<hav<<endl;
}
}