func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(NULL);     int n;     string s;     cin >> n >> s;     int steps0 = 0;     int steps1 = 0;     for (int i = 0; i < n; ++i) {       steps0 += ((s[i] -  0 ) != (i % 2));       steps1 += ((s[i] -  0 ) == (i % 2));     }     cout << min(steps0, steps1) <<   n ;     return 0;   }   