On codechef, it outputs 0,0,0, but on Codeblocks, it ouputs, 2,0,2, as it should, given the inputs:
3
100001
110111
1010
1010
000
111
#include <bits/stdc++.h>
#include <string>
#define ll long long
#define st static
#define co constant
#define str string
#define pb push_back
#define pf pop_front()
#define nLoop for(ll i = 0; i < n; i++)
#define tLoop for(ll i = 0; i < t; i++)
#define ui unsigned int
#define si signed int
using namespace std;
ll m,n,t,ans;
/*vector<ll> a;
vector<ll> b;
*/
vector<ll> d;
ll c;
string a, b;
void solve()
{
ans = 0;
cin >> a >> b;
c = a.length();
d.clear(); d.reserve(c);
for(ll j = 0; j < c; j++){ d[j] = (a[j]!=b[j]);}
for(ll j = 0; j < c; j++)
{
if(d[j]==1&&(j < 2||d[j-1]!=1))++ans;
}
cout << ans << "\n";
}
int main() {
ios::sync_with_stdio(0);cin.tie(0);
int t = 1;
cin >> t;
tLoop
solve();
}