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21 lines
495 B
C++

#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
char str1[1 << 10], str2[1 << 10];
int main() {
scanf("%s%s", str1, str2);
int ans = 0, prev = -1, len = strlen(str1);
for (int i = 0; i < len; i++)
if (str1[i] != str2[i])
if (~prev)
ans += i - prev, prev = -1;
else
prev = i;
printf("%d", ans);
return 0;
}