题目描述

#include<cstdio>
#include<iostream>
#include<string>
#include<cstring>
using namespace std;
int main(void)
{
    string a;
    string b="";
    cin>>a;
    for(int i=0;i<a.size();i++)
    {
        if(isdigit(a[i]))
        {
            for(int j=1;j<=a[i]-'0'-1;j++)
            {
                b=b+a[i-1];
            }
            continue;
        }
        b=b+a[i];       
    }
    cout<<b<<endl;
    return 0;
}