Discussion About Ultra Fast Mathematicians

#1

This is Discussion thread about Ultra Fast Mathematicians

#2

my code passed only one test case why
#include
using namespace std;
int main()
{
string s1,s2;
int t;
cin>>t;
while(t–)
{
cin>>s1>>s2;
for(int i=0;i<s1.length();i++)
{
if(s1[i]==s2[i])
{
s1[i]=s2[i]=‘0’;
}
else
s1[i]=s2[i]=‘1’;
}
cout<<s1;
}
}