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Stdle #127 · containers · 2026-10-11

What does this C++ snippet output?

A past puzzle — fully playable. 4 attempts, hints on wrong guesses.

#include <iostream>
#include <vector>
int main() {
std::vector<int> v(3, 7);
std::cout << v.size() << " " << v[1] << "\n";
}
Containers
4 attempts left

Answer & explanation