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#include <iostream> using namespace std; int rec(int number) { if(number == 0) { return 0; } int cifra = number % 10; return rec(number / 10) + cifra; } int main() { int broj; cin >> broj; cout << rec(broj) << endl; return 0; } /* rec(4313) = rec(431) + 3 = 8 + 3 = 11 rec(431) = rec(43) + 1 = 7 + 1 = 8 rec(43) = rec(4) + 3 = 4 + 3 = 7 rec(4) = rec(0) + 4 = 0 + 4 = 4 rec(0) = 0 **/
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