Run C++ 14 online

What's in C++ 14

• Generic lambdas: `[](auto x) { ... }`.
• `auto` return-type deduction for regular functions.
• Extended constexpr — more real code allowed at compile time.

What you get in C++ 14

Clicking "Run now" opens the playground with this exact code and a matching test case — passes on first Run.

#include<iostream>
int main(){int n;std::cin>>n;std::cout<<n*2<<std::endl;return 0;}

How ls-judge runs C++ 14

Every submission is compiled and executed inside its own Firecracker microVM — the same isolation primitive AWS Lambda uses. No shared container, no shared kernel with other users' code. The C++ 14toolchain shipped with the microVM is the real thing (not a browser-side emulation): syscalls behave the way they do in production, and the compile / runtime behaviour matches what you would see on your own machine with that version installed.

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