#include <bits/stdc++.h>
bool search(int arr[],int n,int num)
{
for(int i=0 ; i<=n ; i++)
{
if(arr[i]==num)
return true;
}
return false;
}
int firstMissing(int arr[], int n)
{
for(int i=1 ; i<=n ; i++)
{
if(search(arr,n,i)==false)
return i;
}
return n+1;
}
time complexity-O(N2)
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