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Fibonacci #1336

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25 changes: 21 additions & 4 deletions homework/fibonacci/fibonacci.hpp
Original file line number Diff line number Diff line change
@@ -1,11 +1,28 @@
#pragma once
#include <iostream>

int fibonacci_iterative(int sequence) {
// TODO: Your implementation goes here
return 0;
if(sequence <= 1) {
return sequence;
}

int a = 0;
int b = 1;

for(int i = 2; i <= sequence; ++i) {
int temp = b;
b += a;
a = temp;
}

return b;
}

int fibonacci_recursive(int sequence) {
// TODO: Your implementation goes here
return 0;
if(sequence <= 1) {
return sequence;
}

int result = fibonacci_recursive(sequence - 1) + fibonacci_recursive(sequence - 2);
return result;
}
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