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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. #define dd double
  5. #define ld long double
  6. #define ull unsigned long long
  7. #define yes cout << "YES\n"
  8. #define no cout << "NO\n"
  9. #define el "\n"
  10. #define Arwa ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  11. #define fix(x) cout << fixed << setprecision(x)
  12. #define all(v) v.begin(),v.end()
  13. #define dpp(v,val) memset(v,val,sizeof(v))
  14. #define mod 1e9+7
  15. #define oo 1e9
  16. const int N = 1e5 + 5;
  17. int gcd(int a, int b) { return b == 0 ? a : gcd(b, a % b); } // log(n) __gcd(a,b)
  18. //todo اى ويل بريبير ماى بيبرز تو بى ذا بيست ان زيس وورلد
  19. string s;
  20. int cnt=0;
  21. map<pair<int,string>,int>dp;
  22. int solve(int i,string x) 
  23. {
  24.    if(i==s.length())
  25.    {
  26.       string y=x; reverse(all(y)); 
  27.       if(x==y) return 1;
  28.       return 0;
  29.    }
  30.    if(dp.count({i,x})) return dp[{i,x}];
  31.    return dp[{i,x}] =solve(i+1,x)+solve(i+1,x+s[i]);
  32. }
  33. void HereWeGoAgain()
  34. {
  35.   dp.clear();
  36.   cin>>s;
  37.   cnt=0;
  38.   cout<<solve(0,"")-1<<el;
  39. }
  40. int32_t main() 
  41. {
  42.     Arwa
  43.     int t=1;
  44.     cin>>t;
  45.     for(int i=1;i<=t;i++)
  46.     {
  47.     HereWeGoAgain();
  48.     }
  49.     return 0;
  50. }
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/HGwZDu
language:
C++ (gcc 8.3)
created:
20 hours ago
visibility:
public

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