#include <bits/stdc++.h> // Tomasz Nowak
using namespace std; // XIII LO Szczecin
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
long long n;
cin >> n;
string in;
while(n) {
in += char('0' + n % 10);
n /= 10;
}
in += "--";
reverse(in.begin(), in.end());
map<string, int> ways;
for(int i = 0; i < 19; ++i)
ways[to_string(i)] = max(0, 10 - abs(i - 9));
vector<long long> dp(size(in), 1);
for(int i = 2; i < size(in); ++i)
dp[i] = dp[i - 1] * ways[string() + in[i]]
+ dp[i - 2] * ways[string() + in[i - 1] + in[i]];
cout << dp.back();
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | #include <bits/stdc++.h> // Tomasz Nowak using namespace std; // XIII LO Szczecin int main() { ios_base::sync_with_stdio(0); cin.tie(0); long long n; cin >> n; string in; while(n) { in += char('0' + n % 10); n /= 10; } in += "--"; reverse(in.begin(), in.end()); map<string, int> ways; for(int i = 0; i < 19; ++i) ways[to_string(i)] = max(0, 10 - abs(i - 9)); vector<long long> dp(size(in), 1); for(int i = 2; i < size(in); ++i) dp[i] = dp[i - 1] * ways[string() + in[i]] + dp[i - 2] * ways[string() + in[i - 1] + in[i]]; cout << dp.back(); } |
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