label_solve.cpp

#include <iostream>
#include <unordered_map>
#include <string>
#include <algorithm>

void get_label(std::unordered_map<std::string, size_t>  map, int pc) {
        std::vector<std::size_t> label_point_vec = {};
        std::vector<std::string> key_vec = {};

        for (const auto &pair : map) {
                label_point_vec.push_back(pair.second);
                key_vec.push_back(pair.first);
        }

        std::sort(label_point_vec.begin(), label_point_vec.end());
        size_t final_point;
        std::string final_label;
        std::vector<size_t> point_stack;

        for (auto point : label_point_vec) {
                if (pc >= point) {
                        point_stack.push_back(point);
                }
        }
        final_point = point_stack[point_stack.size() - 1];

        for (auto& k : key_vec) {
                auto n = map.find(k);
                if (n->second == final_point) {
                        final_label = k;
                        break;
                }
        }

        std::cout << final_label << std::endl;
}

int main() {
        std::unordered_map<std::string, size_t> map;
        int pc = 17;

        map["main"] = 0;
        map["kek"] = 5;
        map["ok"] = 17;
        get_label(map, pc);
}

use std::io;

fn main() {
    let mappings = vec![vec!["main", "0"], vec!["test", "7"], vec!["kek", "15"]];

    let mut input = String::new();
    println!("Enter A Number: ");
    io::stdin()
        .read_line(&mut input)
        .expect("An error occured while reading input");
    let input = input
        .trim()
        .parse::<i32>()
        .expect("Invalid Number Supplied");
    let size = mappings.len() - 1;
    for (key, value) in mappings.iter().enumerate() {
        if (input >= mappings[mappings.len() - 1][1].parse::<i32>().unwrap()) {
            return println!("{}", mappings[mappings.len() - 1][0]);
        }

        if (input >= value[1].parse::<i32>().unwrap()
            && input < mappings[key + 1][1].parse::<i32>().unwrap())
        {
            return println!("{}", mappings[key][0]);
        }
    }
}

Took me almost an hour but I think it was worth it.