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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 | #include <iostream> using namespace std; int A, B = 0; int i=0; int main() { ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); while (1) { cin >> A; if (0 <= A && A <= 99) break; } B = A; while (1) { B = (B % 10) * 10 + ((B / 10) + (B % 10))%10; i++; if (B == A) break; } cout << i << ‘\n’; return 0; } | cs |