Morass

Another Palindrome

Sep 9th, 2016
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C++ 1.31 KB | None | 0 0
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define PB push_back
  4. #define ZERO (1e-10)
  5. #define INF (1<<29)
  6. #define CL(A,I) (memset(A,I,sizeof(A)))
  7. #define DEB printf("DEB!\n");
  8. #define D(X) cout<<"  "<<#X": "<<X<<endl;
  9. #define EQ(A,B) (A+ZERO>B&&A-ZERO<B)
  10. typedef long long ll;
  11. typedef long double ld;
  12. typedef pair<ll,ll> pll;
  13. typedef vector<int> vi;
  14. typedef pair<int,int> ii;
  15. typedef vector<ii> vii;
  16. #define IN(n) int n;scanf("%d",&n);
  17. #define FOR(i, m, n) for (int i(m); i < n; i++)
  18. #define REP(i, n) FOR(i, 0, n)
  19. #define F(n) REP(i, n)
  20. #define FF(n) REP(j, n)
  21. #define FT(m, n) FOR(k, m, n)
  22. #define aa first
  23. #define bb second
  24. void ga(int N,int *A){F(N)scanf("%d",A+i);}
  25. #define MX (62)
  26. char s[MX];
  27. ll dp[MX][MX][2];
  28. void mb(int&b,int&e,char c){
  29.     while(s[b]^c)++b;
  30.     while(s[e]^c)--e;
  31. }
  32. ll dyn(int b,int e,bool x){
  33.     if(b==e)return x+1;
  34.     if(b>e)return x;
  35.     ll &v(dp[b][e][x]);
  36.     int B=e,E=b;
  37.     if(~v)return v;
  38.     v=s[b]==s[e]?dyn(b+1,e-1,1):0;
  39.     do{
  40.         v+=dyn(b+1,E-1,1);
  41.         while(s[++E]^s[b]&&E<e);
  42.     }while(E<e);
  43.     do{
  44.         v+=dyn(B+1,e-1,1);
  45.         while(s[e]^s[--B]&&B>b);
  46.     }while(B>b);
  47.     v+=dyn(b+1,e-1,x);
  48.     return v;
  49. }
  50. int main(void){
  51.     IN(tt)F(tt)
  52.         scanf("%s",s),CL(dp,-1),printf("%lld\n",dyn(0,strlen(s)-1,0));
  53.     return 0;
  54. }
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