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The integers from 1 to n are stored in an array in random fashion. One of the numbers is missing. What is an example of a program that will find the missing number?
Wiki User
∙ 15y ago
1. Determine the sum of 1..n = (n(n+1))/2 2. Subtract all the elements in the given array (n-1 elements) from the expected sum. 3. The missing number is the value remaining. /* Implementation in "C" */
int MissingNumber(int values[], int n)
{
int total = (n * (n+1))/2;
while (n>1)
{
total -= values[n-2];
n--;
}
return total;
}
Wiki User
∙ 15y ago
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