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#include <iostream> using namespace std; int memo[1000006]; int f(int x) { if(x == 0) { return 0; } if(memo[x] != -1) { return memo[x]; } int tmp = x; int najmal_broj_pati = 2000000; while(tmp > 0) { int cifra = tmp % 10; if(cifra != 0) { najmal_broj_pati = min(najmal_broj_pati, f(x - cifra) + 1); } tmp /= 10; } memo[x] = najmal_broj_pati; return najmal_broj_pati; } int main() { int n; cin >> n; for(int i = 0; i <= n; i++) { memo[i] = -1; } cout << f(n) << endl; return 0; }
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