Sorting of strings according to length & alphabetically

#1

Please help me to find the error in this below code

#include
#include<bits/stdc++.h>
using namespace std;

bool comp (string a, string b)
{
if (a.length()>=b.length() && a.substr(0,b.length())==b)
{
return true;
}
else if (b.length()>a.length() && b.substr(0,a.length())==a)
{
return false;
}
else
{
return a<b;
}
}
int main()
{
vector a;
int n;
cin>>n;
if(n==0)
{
return 0;
}
if(n<0)
n=n*-1;

for (int i=1; i<=n;i++ )
{
	string s;
	cin>>s;
	a.push_back(s);
}

sort(a.begin(), a.end(), comp);

for (int i=0; i<=a.size()-1; i++)
{
	string m = a[i];
	cout<<m<<",";
}
return 0;

}

#2

hi @Hvarshney
I can see that u have successfully submitted the code and gained full points… is there still anything??

#3

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#4

just wanted to clarify then get line is necessary for string ?
or can we directly use cin>>s; to input a string

#5

hi @Hvarshney
u can directly take input of string…
string str;
cin>>str;