find first number that have great increasing than another

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I have array of numbers. After one number of these,the progress is big and numbers after that start to increase rapidly. How can I find this specific number? for example:we have 2,4,7,8,6,19,26,38,50 and from 2 to 6 the progress is small but from 19 the progress is big, the answer is 19.
How can I find this number in C or C#?

Posted 17-Jan-13 14:11pm

Saman Bahmani

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Sergey Alexandrovich Kryukov 17-Jan-13 20:17pm

We won't do your homework for you, sorry. What have you done so far, what's the problem?

You wording sounds gibberish, by the way; listen to yourself: "progress is big", "start to increase rapidly" (aha, if no so rapidly, the algorithm is different, isn't it? :-). If you have no clue of elementary school mathematics, be advised that his is on of most basic prerequisites to programming. Whatever you ask, it should be formulated formally, not just by example.

Please don't tell us you are a beginner: we see it; this is not an excuse for not using your brain.

Good luck,
—SA

adriancs 17-Jan-13 21:53pm

for rapid change, cache the last existed largest number.
for slow change, compare the values one by one, or
sort the values and get the 1st or last.

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F.moghaddampoor · Answer 1 · 2013-01-17T14:24:00

Well you should define a margin, like say the diffence between numbers.
So lets say the margin is 2.
write a for loop:
int[] a=new int[100]
for (int i=0;i<100;i++)
{
current= read(input);
}
margin=5;
for (int i=0;i<100;i++)
{
if a[i]-a[i-1]>margin writeoutput(i.tostring());
break;
}
hope to helped you :)