whats wrong with this code?
#include
#include
#include<string.h>
#include
using namespace std;
main(){
int t;
cin>>t;
for(int i=0;i<t;i++){
string s;
cin>>s;
int p=s.size()/2;
char A[p],B[p];
for(int j=0;j<p;j++){A[j]=s[j];}
for(int j=s.size()-1,k=0;j>=p;j–,k++){B[k]=s[j];}
sort(A,A+p);
sort(B,B+p);
vector v1§;
vector v2§;
vector ::iterator it1;
vector ::iterator it2;
it1=unique_copy(A,A+p,v1.begin());
it2=unique_copy(B,B+p,v2.begin());
v1.resize(it1-v1.begin());
v2.resize(it2-v2.begin());
//int p1=v1.size();
//sort(v1,v1+p1)
if(v1.size()!=v2.size()){cout<<“NO”<<endl;}
else{
int k1=0;
for(int j=0;j<v1.size();j++){
if(v1[j]!=v2[j]){k1++;}
}
int a[v1.size()],b[v2.size()];
for(int j=0;j<v1.size();j++){
int k2=0;
for(int k=0;k<p;k++){
if(v1[j]==A[k]){k2++;}
}
a[j]=k2;
}
for(int j=0;j<v2.size();j++){
int k2=0;
for(int k=0;k<p;k++){
if(v2[j]==B[k]){k2++;}
}
b[j]=k2;
}
int k3=0;
for(int j=0;j<v1.size();j++){
if(a[j]!=b[j]){k3++;}
}
if(k3>0 || k1>0){cout<<“NO”<<endl;}
else{cout<<“YES”<<endl;}
}
}
}
Its a bit difficult to have a good look over your code atm. I strongly advise that you either givea submission link to your code, or edit the post (select your code, and THEN press button “insert code”)
But by what I could get, I will say just make 2 arrays - int a[26], b[26] and increase the frequency of letters you encounter in the half of string.
Eg-
for (i= 0; i <n /2; i++)
{
arr[s[i]-‘a’]++;
}
EDIT: Something seems wrong with this insert code thing atm. I just cant make it write my code properly like I used to…
i am unable to find out error please help me
#include<stdio.h>
#include<string.h>
int main()
{
int t,c,start,end,flag,i;
char s[1000];
scanf("%d",&t);
while(t–)
{
flag=0;
scanf("%s",s);
c=strlen(s);
if(c%2==0)
start=c/2;
else
start=c/2+1;
end=c/2-1;for(i=0;i<=end;i++) { if(s[i]==s[start++]) continue; else{ flag=1; break; } } if(flag==0) printf("YES\n"); else printf("NO\n"); } return 0;}
Hey there, Can somebody solve my problem regarding LAPIN.
According to the question, zyzxyz is not lapindrome but my code, which has been accepted by the compiler gives YES to it.
I am confused…
import java.util.HashMap;
import java.util.Scanner;
class LAPIN {
public static void main(String[] args) throws Exception {
Scanner scanner = new Scanner(System.in);
int t = scanner.nextInt();
for (int i = 0; i < t; i++) {
String s = scanner.next();
int half = s.length() / 2;
String s1 = s.substring(0, half);
String s2 = s.substring(half, s.length());
HashMap<Character, Integer> map1 = new HashMap<Character, Integer>();
for (int j = 0; j < s1.length(); j++) {
if (!map1.containsKey(s1.charAt(j))) {
map1.put(s1.charAt(j), 1);
} else {
map1.put(s1.charAt(j), map1.get(s1.charAt(j) + 1));
}
}
HashMap<Character, Integer> map2 = new HashMap<Character, Integer>();
int k = s2.length() % 2 != 0 ? 1 : 0;
for (; k < s2.length(); k++) {
if (!map2.containsKey(s2.charAt(k))) {
map2.put(s2.charAt(k), 1);
} else {
map2.put(s2.charAt(k), map2.get(s2.charAt(k) + 1));
}
}
if (map1.equals(map2)) {
System.out.println(“YES”);
} else {
System.out.println(“NO”);
}
}
}
}
It passed all the test cases in my local but when I submit my code it showing the wrong answer. Can somebody help me, please
i got WA becoz i was priniting “Yes” instead of “YES” .
lol
2 Likes
Hello, pls anyone give me the test cases for which the following code doesn’t work : CodeChef: Practical coding for everyone ??
(LAPIN)
This satisfies all test cases but I get wrong answer.
Link to solution:
https://www.codechef.com/viewsolution/17144359
Help Me please !!
I am unable to find and rectify the error in the following :
#include <bits/stdc++.h>
#include <string>
using namespace std;
#define N 1000000007
#define ll long long
int main()
{
ll t;
cin>>t;
while(t--)
{
string s;
cin>>s;
ll l;
if(s.length()%2==0)
{
l=s.length()/2;
}
else{
l=(s.length()-1)/2;
}
char a1[l],a2[l];
if(s.length()%2==0)
{
for(int i=0;i<l;i++)
{
a1[i]=s[i];
a2[i]=s[i+l];
}
}
else{
for(int i=0;i<l;i++)
{
a1[i]=s[i];
a2[i]=s[i+l+1];
}
}
a1[l]='\0';
a2[l]='\0';
sort(a1,a1+l);
sort(a2,a2+l);
bool isSame=true;
for(int i=0;i<l;i++)
{
if(a1[i]!=a2[i])
{
isSame=false;
break;
}
}
if(isSame)
{
cout<<"YES\n";
}
else{
cout<<"NO\n";
}
}
return 0;
}
It is satisfying all test cases but getting a WA.
https://www.codechef.com/viewsolution/19355962
Would appreicate some help here! Using similar logic. Works with multiple test cases on other online compilers. Char array is 1 more than 1000 for ‘\0’. specially added condition when s<1. getting WA with or without the s condition. Please help!
CodeChef: Practical coding for everyone here’s the link in python. Still wont work. The one with editorial logic worked but this doesnt even with multiple testcases on the codechef compiler. Pleas help!!!
want a cookie :P…why complicate a cake-walk !
4 Likes
Oh @v_akshay, nice!
So, basically I could rewrite isLapin as follows:
isLapin(string S)
{
int len = S.length();
int r1 = len/2, l2 = (len+1)/2;
sort(S.begin(), S.begin() + r1);
sort(S.begin() + l2, S.end());
return S.substr(0, r1) == S.substr(l2);
}
@spandanpathak, surely this can’t be called “complicating” 
3 Likes
@sumanth232 , well, I know that but we have |S|<=1000, so O(nlogn) is well under time constraints 
.
@pragrame , thanks , and perfect implementation
try this:
1
abac