func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 0x3f3f3f3f;   char s[100005];   int main() {     int i, n, cnt1, cnt2, ans1, ans2;     cnt1 = cnt2 = ans1 = ans2 = 0;     scanf( %d%s , &n, s);     for (i = 0; i < n; i++) {       if (i & 1) {         if (s[i] ==  r ) cnt1++;       } else {         if (s[i] ==  b ) cnt2++;       }     }     ans1 = max(cnt1, cnt2);     cnt1 = cnt2 = 0;     for (i = 0; i < n; i++) {       if (i & 1) {         if (s[i] ==  b ) cnt1++;       } else {         if (s[i] ==  r ) cnt2++;       }     }     ans2 = max(cnt1, cnt2);     printf( %d , min(ans1, ans2));   }   