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| #include <iostream> |
| #include <string> |
| #include <map> |
|
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| using namespace std; |
|
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| string input; |
| map<int, unsigned long long> memory; |
| map<int, unsigned long long>::iterator it; |
| int len; |
|
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| unsigned long long findNumDecoding(int index) |
| { |
| if(index == len || index == len-1) |
| return 1ull; |
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| it = memory.find(index); |
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| if(it != memory.end()) |
| return (it->second); |
|
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| unsigned long long result; |
|
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| if(input[index] > '2' || (input[index] == '2' && input[index+1] > '6') || (index+2 < len && input[index+2] == '0')) |
| result = findNumDecoding(index+1); |
| else if(input[index+1] == '0') |
| result = findNumDecoding(index+2); |
| else |
| result = (findNumDecoding(index+1) + findNumDecoding(index+2)); |
|
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| memory.insert(make_pair(index, result)); |
|
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| return result; |
| } |
|
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| int main(void) |
| { |
| cin >> input; |
|
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| while(input != "0") |
| { |
| len = input.length(); |
|
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| cout << findNumDecoding(0) << endl; |
|
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| input.clear(); |
| memory.clear(); |
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| cin >> input; |
| } |
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| return 0; |
| } |
