认识一下

#include<iostream>
using namespace std;
int main()
{
string s;
int n;
cin >> s >> n;
while (n--)
{
string t;
for (int i = 0; i < s.size();)
{
int j = i;
while (j < s.size() && s[j] == s[i]) j++;
int cnt = j - i;
t += (to_string(cnt) + s[i]);
i = j;
}
s = t;
}
cout << s <<endl;
}