#include <vector>
#include <iostream>
std::vector<int> V1 = { 1, 2 };
std::vector<int> V2;
std::vector<int> V3 = { 1, 1, 1, 1 };
int main()
{
for (auto* v : {&V1, &V2, &V3}) { std::cout << v->size() << std::endl; }
}
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