Not taking second string input

#1

#include

using namespace std;
int main() {
int cases;
cin>>cases;

for(int i=1;i<=cases;i++)
{   string s1,s2,s3;
	
    getline(cin,s1);
    getline(cin,s2);

	int n=s1.length();

	for(int i=0;i<n;i++)
	{
		int a=s1[i];
	    int b=s2[i];
		if(a==b)
		{
			s3[i]=0;
		}
		else s3[i]=1;
	}

	for(int i=0;i<n;i++)
	cout<<s3[i];
	
}  
return 0;

}

#2

hello @himanshu24

print output of each test case in seprate line

#3

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