long long unsigned factorial(long long unsigned num){    return num < 2LL? 1LL : (factorial(num - 1LL) * num);}long long unsigned factoricalSum(long long unsigned num){    return num < 2LL? 1LL : factoricalSum(num - 1LL) + factorial(num);}

 

long long unsigned factoricalSum(long long unsigned num){    function
     
       factorial;    factorial = [&factorial](decltype(num) n){
     return n < 2LL? 1LL : (factorial(n - 1LL) * n);};    return num < 2LL? 1LL : factoricalSum(num - 1LL) + factorial(num);}
     

 

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