std::vector<bool> people(1000, true);
int remainPeople = 1000, count = 0, index = 0;
while(remainPeople > 1){
if(people[index]) {
count++;
if (count == 2) {
people[index] = false;
count = 0;
remainPeople--;
}
}
index++;
if(index == 1000)
index = 0;
}
for(int i = 0; i < 1000; ++i){
if(people[i] != false)
std::cout << i << std::endl;
}