S001-AC.cc 233 Bytes Edit Raw Blame History Permalink 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 #include <iostream> using namespace std; int number_of_digits(int n) { if(!n || !(n/10)) { return 1; } return 1 + number_of_digits(n/10); } int main() { int a; cin >> a; cout << number_of_digits(a) << endl; return 0; }