Help me in solving MISSP problem

help
,
1

My issue

please help me why codechef is bombarding me with wrong answer when my code seems correct gives same sample output and very similar to accepted submissions

My code

#include <iostream>
using namespace std;

int main() {
    int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        int a[n];
        for (int i = 0; i < n; i++) {
            cin >> a[i];
        }

        for (int i = 0; i < n; i++) {
            if(a[i]>0){
               for (int j = i+1; j < n; j++) {
                    if (a[i] == a[j]&& i!=j) {
                    a[i] = a[j] = -1;
                    }
               }
            }
        }

        for (int i = 0; i < n; i++) {
            if (a[i] != -1) {
                cout << a[i] << " ";
            }
        }

        cout << endl;
    }
    return 0;
}

Problem Link: MISSP Problem - CodeChef

2

@prathamsch77
Have corrected your code
one case is missing when a[i] is 0 .

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

bool sol(int n,string s,char c1,char c2){
    
    for(int i=0;i<n-1;i++){
        if(s[i]==s[i+1]&&s[i]==c1)
            s[i]=s[i+1]=c2;
    }
    for(int i=0;i<n-1;i++){
        if(s[i]!=s[i+1])
        return 0;
    }
    return 1;
}
int main(){
	  
	  int t;cin>>t;
	  while(t--){
	      
	      int n;cin>>n;
	      string s;
	      cin>>s;
	      
	      if(sol(n,s,'0','1')||sol(n,s,'1','0'))
	      cout<<"YES"<<endl;
	      else
	      cout<<"NO"<<endl;
	      
	  }
	  return 0;
}