#include <bits/stdc++.h>
using namespace std;
#define LL long long
#define ULL unsigned LL
#define LD long double
ULL w = 0;
int toint(char x) {
return x - '0';
}
void trackback(int n, ULL ob, string x, int dl) {
//cout<<n<<endl;
if(n>=dl) {
w+=ob;
//cout<<ob<<endl;
}
else {
if(n!=(dl-1)) {
LL oby = toint(x[n]) * 10 + toint(x[n+1]);
if(oby<=18 && oby >= 10) {
int mina = 18 - oby;
LL wx = mina + 1;
ULL obx = (ULL) wx * ob;
trackback(n+2, obx, x, dl);
}
}
LL oby = toint(x[n]);
if(oby>=0 && oby<=9) {
LL wx = oby+1;
ULL obx = (ULL) wx * ob;
trackback(n+1, obx, x, dl);
}
}
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
string n;
cin>>n;
int dl = n.size();
//cout<<dl<<endl;
trackback(0, 1, n, dl);
cout<<w;
}
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 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | #include <bits/stdc++.h> using namespace std; #define LL long long #define ULL unsigned LL #define LD long double ULL w = 0; int toint(char x) { return x - '0'; } void trackback(int n, ULL ob, string x, int dl) { //cout<<n<<endl; if(n>=dl) { w+=ob; //cout<<ob<<endl; } else { if(n!=(dl-1)) { LL oby = toint(x[n]) * 10 + toint(x[n+1]); if(oby<=18 && oby >= 10) { int mina = 18 - oby; LL wx = mina + 1; ULL obx = (ULL) wx * ob; trackback(n+2, obx, x, dl); } } LL oby = toint(x[n]); if(oby>=0 && oby<=9) { LL wx = oby+1; ULL obx = (ULL) wx * ob; trackback(n+1, obx, x, dl); } } } int main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); string n; cin>>n; int dl = n.size(); //cout<<dl<<endl; trackback(0, 1, n, dl); cout<<w; } |
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