stack

//字符串展开
#include<bits/stdc++.h>
using namespace std;
string s;

int main()
{
    cin >> s;
    stack<string> st;
    stack<int> cnt;
    string res;
    int num = 0;
    for (const auto c:s){
        if (c == '%'){
            cnt.push(num);
            num = 0;
            st.push(res);
            res.clear();

        } else if (c >= '0' && c <= '9'){
            num *= 10;
            num += c - '0';

        } else if (c == '#'){
            const auto count = cnt.top();
            auto t = st.empty() ? "" : st.top();
            for (int i = 0; i < count ; ++i)
                t += res;
            if (!st.empty()) st.pop();
            cnt.pop();
            res = t;

        } else {
            res += c;
        }
    }

    cout << res << endl;

}