Rod cutting Bottom Up aproach

#1

i did’nt get what exactly being done in bottom up approach.can anyone explain it in detail

#2

if are asking in general then this is best way to differentiate b/w top down and bottom up

  • Bottom Up - I’m going to learn programming. Then, I will start practicing. Then, I will start taking part in contests. Then, I’ll practice even more and try to improve. After working hard like crazy, I’ll be an amazing coder.
  • Top Down - I will be an amazing coder. How? I will work hard like crazy. How? I’ll practice more and try to improve. How? I’ll start taking part in contests. Then? I’ll practicing. How? I’m going to learn programming.
#3

and in context to problem
this is happening

consider rod of length i
for (i = 1; i<=n; i++)

{
divide rod of length i into two rods of length j and i-j each and tak maximum
int max_val = INT_MIN;

for (j = 0; j < i; j++)

max_val = max(max_val, price[j] + val[i-j-1]);

val[i] = max_val;

}

#4

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