71.cpp

/**
 *    author:   vulkan
 *    created:  18.06.2020 06:25:57 PM
**/
#include <bits/stdc++.h>

using namespace std;

vector<string> split_string(string s, char c = ' ') {
    vector<string> ans;
    int start_idx = 0;
    int n = s.size();
    for (int i = 0; i <= n - 1; ++i) {
        if (s[i] == c) {
            ans.push_back(s.substr(start_idx, i - start_idx));
            start_idx = i + 1;
        }
    }

    if (start_idx < n) {
        ans.push_back(s.substr(start_idx));
    }

    return ans;
}

string simplifyPath(string s) {
    vector<string> split = split_string(s, '/');
    stack<string> st;
    for (string x : split) {
        if (not x.empty()) {
            if (x == "..") {
                if (not st.empty()) {
                    st.pop();
                }
            } else if (x != ".") {
                st.push(x);
            }
        }
    }

    vector<string> ans;
    while (not st.empty()) {
        ans.push_back(st.top());
        st.pop();
    }

    reverse(ans.begin(), ans.end());
    int sz = ans.size();
    string ans_s = "/";
    for (int i = 0; i <= sz - 1; ++i) {
        ans_s = ans_s + ans[i];
        if (i < sz - 1) {
            ans_s = ans_s + "/";
        }
    }

    return ans_s;
}

int main(int argc, char const *argv[]) {
    string s;
    cin >> s;

    cout << simplifyPath(s);

    return 0;
}