| #include <iostream> |
| #include <cstdio> |
| #include <cstring> |
| #include <cstdlib> |
| #define MAX_SIZE 5010 |
|
|
| char *input; |
| int size; |
|
|
| unsigned long long cache[MAX_SIZE]; |
|
|
| unsigned long long rec(int i) { |
| |
| if (i >= size - 1) { |
| if (i == size - 1 && input[i] == '0') return -1; |
| return 0; |
| } |
| if (cache[i] != -1) return cache[i]; |
|
|
| unsigned long long ans; |
| switch (input[i]) { |
| case '0': |
| ans = - 1; |
| break; |
| case '2': |
| if (input[i+1] > '6') { |
| ans = rec(i + 1); |
| break; |
| } |
| case '1': |
| ans = 1 + rec(i + 1) + rec(i + 2); |
| break; |
| default: |
| ans = rec(i + 1); |
| break; |
| } |
|
|
| return cache[i] = ans; |
| } |
|
|
| int main() { |
| size_t max_size = MAX_SIZE; |
| input = (char*) malloc(sizeof(char) * (MAX_SIZE + 1)); |
|
|
| while (true) { |
| size = getline(&input, &max_size, stdin); |
| --size; |
| input[size] = '\0'; |
| |
|
|
| memset(cache, -1, sizeof(unsigned long long) * MAX_SIZE); |
| |
| if (input[0] == '0') break; |
|
|
| std::cout << 1 + rec(0) << std::endl; |
| } |
| } |
