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#include <iostream> using namespace std; const int maxn = 2005; const int max_weight = 3550; const int INF = 1e9; string s; int dp[maxn]; int rec(int at) { if(at >= s.size()) { return 1; } if(dp[at] != -1) { return dp[at]; } int result = 0; if(s[at] != '0') { result += rec(at + 1); } if(at + 1 < s.size() and s[at] != '0') { int tmp_number = (s[at] - '0') * 10 + (s[at + 1] - '0'); if(tmp_number <= 26 and tmp_number != 0) { result += rec(at + 2); } } return dp[at] = result; } int main() { cin >> s; for(int i = 0; i < maxn; i++) { dp[i] = -1; } cout << rec(0) << endl; return 0; }
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