#include <stdio.h>
int main() {
int tombol;
long long kelereng = 0;
while (1) {
if (tombol == 9) {
break;
} else if (tombol == 1) {
kelereng += 1;
} else if (tombol == 2) {
if (kelereng % 2 == 0) {
kelereng = kelereng / 2;
} else {
kelereng = kelereng * 2;
}
}
}
return 0;
}
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