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  1. #include <stdio.h>
  2.  
  3. char str[50010];
  4.  
  5. unsigned long long x, y, P[50010], B = 1947698881ULL;
  6.  
  7. int F(int i, int j){
  8.     if(i >= j) return (i == j);
  9.  
  10.     x = y = 0;
  11.     int r = 1, l = 0;
  12.     while (i < j){
  13.         x = x * B + str[i];
  14.         y = P[l] * str[j] + y;
  15.         if (x == y){
  16.             r = 2 + F(i + 1, j - 1);
  17.             break;
  18.         }
  19.         i++, l++, j--;
  20.     }
  21.     return r;
  22. }
  23. int main(){
  24.     int T = 0, t, i;
  25.     P[0] = 1ULL;
  26.     for(i = 1; i < 50010; i++) P[i] = (P[i - 1] * B);
  27.  
  28.     scanf("%d", &t);
  29.     while (t--){
  30.         scanf("%s", str);
  31.         printf("Case #%d: %d\n", ++T, F(0, strlen(str) - 1));
  32.     }
  33.     return 0;
  34. }
  35.  
Success #stdin #stdout 0s 2732KB
comments (?)
stdin 
4
PASTIPAS
ABCADDABCA
MADAMIAMADAM
ACMICPCJAKARTASITE
stdout 
Case #1: 3
Case #2: 8
Case #3: 11
Case #4: 1
https://ideone.com/6AVLRk
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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