#define _USE_MATH_DEFINES #include //cin, cout #include //vector #include //sort,min,max,count #include //string,getline, to_string #include //abs(int) #include //swap, pair #include //deque #include //INT_MAX #include //bitset #include //sqrt, ceil. M_PI, pow, sin #include //fixed #include //setprecision #include //stringstream #include //gcd, assumlate #include //randam_device #include //numeric_limits using namespace std; constexpr long long int D_MOD = 1000000007; int main() { string S; char c; while (cin.get(c)) { if (c == '\n') { break; } if (c != '0') { S.push_back(c); } } cout << S.size() - 1 << endl; return 0; }