#include <iostream>
#include <vector>
using namespace std;
int main() {
vector<int> v;
for(int i = 0; i < 5; ++i)
{
v.push_back(i);
}
cout << "variant 1:" << endl;
for(vector<int>::iterator current = v.end();
current != v.begin();
/* nothing */)
{
--current;
cout << *current << endl;
}
cout << "variant 2:" << endl;
for(vector<int>::iterator current = --v.end();
current != v.begin();
/* nothing */)
{
--current;
cout << *current << endl;
}
cout << "variant 3:" << endl;
for(vector<int>::iterator current = --v.end();
current != v.begin();
--current)
{
cout << *current << endl;
}
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8dmVjdG9yPgoKdXNpbmcgbmFtZXNwYWNlIHN0ZDsKCmludCBtYWluKCkgewoJCgl2ZWN0b3I8aW50PiB2OwoJZm9yKGludCBpID0gMDsgaSA8IDU7ICsraSkKCXsKCQl2LnB1c2hfYmFjayhpKTsKCX0KCQoJY291dCA8PCAidmFyaWFudCAxOiIgPDwgZW5kbDsKCWZvcih2ZWN0b3I8aW50Pjo6aXRlcmF0b3IgY3VycmVudCA9IHYuZW5kKCk7CgkJY3VycmVudCAhPSB2LmJlZ2luKCk7CgkJLyogbm90aGluZyAqLykKCXsKCQktLWN1cnJlbnQ7CgkJY291dCA8PCAqY3VycmVudCA8PCBlbmRsOwoJfQoJCgljb3V0IDw8ICJ2YXJpYW50IDI6IiA8PCBlbmRsOwoJZm9yKHZlY3RvcjxpbnQ+OjppdGVyYXRvciBjdXJyZW50ID0gLS12LmVuZCgpOwoJCWN1cnJlbnQgIT0gdi5iZWdpbigpOwoJCS8qIG5vdGhpbmcgKi8pCgl7CgkJLS1jdXJyZW50OwoJCWNvdXQgPDwgKmN1cnJlbnQgPDwgZW5kbDsKCX0KCQoJY291dCA8PCAidmFyaWFudCAzOiIgPDwgZW5kbDsKCWZvcih2ZWN0b3I8aW50Pjo6aXRlcmF0b3IgY3VycmVudCA9IC0tdi5lbmQoKTsKCQljdXJyZW50ICE9IHYuYmVnaW4oKTsKCQktLWN1cnJlbnQpCgl7CgkJY291dCA8PCAqY3VycmVudCA8PCBlbmRsOwoJfQoJCglyZXR1cm4gMDsKfQ==