Return Value Optimization (RVO) & Move Semantics

Medium Move Semantics

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Problem Statement

Write a C++ program demonstrating Return Value Optimization (RVO) and how compiler optimizations interact with move semantics.

Input Format

A single word string S.

Output Format

Print returned string.

Constraints

1 <= Length <= 50

Sample Input

RVOString

Sample Output

RVOString

Explanation

RVO eliminates temporary copies and moves entirely by constructing return values directly in the destination memory address.

Starter Code

#include <iostream>
#include <string>

std::string createString(const std::string &s) {
    // Write your factory function logic here
    return s;
}

int main() {
    std::string s;
    if (std::cin >> s) {
        std::string res = createString(s);
        std::cout << res << "n";
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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