#include
#include
using namespace std;
bool compare(string a, string b)
{
return a>b;
}
int main()
{
int t;
cin>>t;
while(t–)
{
int m;
cin>>m;
string s[m];
for(int i=0;i<m;i++)
{
cin>>s[i];
}
sort(s, s+m, compare);
string ans;
for(int i=0;i<m;i++)
{
ans+=s[i];
}
cout<<ans<<endl;
}
return 0;
}
what’s wrong in this code? answer is showing correct but couldn’t even passed the single test case!!
hello @sourav_817
your comparator is not correct.
for example -> for input 2 21
your comparator order them as 212 but correct order should be 221.
so change ur comparator.
it should be
return a+b > b+a
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