#include <iostream> #include <cstring> using namespace std; const int N = 110; int n; char s1[N], s2[N]; void turn(int i) { if (s1[i] == '*') s1[i] = 'o'; else s1[i] = '*'; } int main() { cin >> s1 >> s2; n = strlen(s1); int res = 0; for (int i = 0; i < n; i ++ ) if (s1[i] != s2[i]) { turn(i), turn(i + 1); res ++ ; } cout << res << endl; }
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