Ларцы

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <utility>

struct box {
    std::string name = "";
    int num = 0;
    bool obj = false;
};

void Dive(std::vector<std::pair<box, std::vector<box>>>& a, int n, bool depth) {
    for (int j = 0;; ++j) {
        if (a[j].first.num == n) {
            n = j;
            break;
        }
    }
    for (int i = 0; a[n].second[i].name != "" && i < 100; ++i) {
        if (!a[n].second[i].obj) {
            std::cout << a[n].second[i].name << " ";
        }
        else {
            Dive(a, a[n].second[i].num, true);
        }
    }
    if (!depth) {
        std::cout << "\n";
    }
    return;
}

int main() {
    std::fstream str;
    str.open("Input.txt");
    if (!str.is_open()) {
        std::cout << "FAILED TO OPEN FILE 1";
        return 0;
    }
    std::vector<std::pair<box, std::vector<box>>> a(100);
    for (int ind = 0; ind < 100; ++ind) {
        a[ind].second.resize(100);
    }
    int i = 0;
    while (!str.eof()) {
        str >> a[i].first.name;
        str >> a[i].first.num;
        int j = -1;
        bool f = false, k = false, gr = false;
        for (char p; (p = str.get()) != '\n' && !str.eof();) {
            if (p == ' ') {
                if (f && !gr) {
                    a[i].second[j].obj = true;
                }
                else {
                    f = false;
                }
                k = false;
                if (!f) {
                    ++j;
                }
                continue;
            }

            if (!f) {
                a[i].second[j].name.push_back(p);
            }
            else {
                gr = true;
                if (!k) {
                    a[i].second[j].num = p - '0';
                    k = true;
                }
                else {
                    a[i].second[j].num *= 10;
                    a[i].second[j].num += p - '0';
                }
            }
            if (a[i].second[j].name == "Box") {
                f = true;
            }
            else {
                f = false;
            }

        }
        ++i;
    }
    for (int idk = 0; a[idk].first.name != "" && idk < 100; ++idk) {
        std::cout << a[idk].first.name << " " << a[idk].first.num << " ";
        Dive(a, a[idk].first.num, false);
    }
    str.close();
}