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  1. #include<bits/stdc++.h>
  2. #define ull unsigned long long
  3. #define ll long long
  4. #define all(x) x.begin(), x.end()
  5. using namespace std;
  6. const int maxn = 2e5 + 1;
  7. const ll mod = 1e9;
  8. int A[255];
  9. ll factorial[21];
  10. void giaithua() {
  11.     factorial[0] = 1;
  12.     for (ll i = 1; i <= 20; ++i) {
  13.         factorial[i] = factorial[i - 1] * i;
  14.     }
  15. }
  16. int main() {
  17.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  18.     giaithua();
  19.     int n;
  20.     cin >> n;
  21.     string s;
  22.     while (n--) {
  23.         for (char i = 'A'; i <= 'z'; ++i) {
  24.             A[i] = 0;
  25.         }
  26.         cin >> s;
  27.         for (int i = 0; i < s.size(); ++i) {
  28.             A[s[i]]++;
  29.         }
  30.         ll res = factorial[s.size()] % mod;
  31.         for (char i = 'A'; i <= 'z'; ++i) {
  32.             res = ((res % mod) / (factorial[A[i]] % mod)) % mod;
  33.         }
  34.         cout << res - 1 << endl;
  35.     }
  36.  
  37.  
  38. }
  39.  
  40.  
Success #stdin #stdout 0.02s 5288KB
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https://ideone.com/kDo8mv
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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