Why its show wrong answer?

#1
#2

hello @Nikhil-Jettley-2567269533523013
a) use long long in place of int .

b) image

this is not correct way of intitialisation , it will initalise on index n with 0.
rest will contain garbage value.
follow this->
long long n;
cin>>n;
long long dp[n+1];
memset(dp,0,sizeof(dp));

#3

https://practice.geeksforgeeks.org/problems/friends-pairing-problem/0

#4

srry , i didnt get ur doubt

#5

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