# C Exercises: Check three given integers and return true if one of them is 20 or more less than one of the others

## C-programming basic algorithm: Exercise-26 with Solution

Write a C program to check three given integers and return true if one of them is 20 or more and less than one of the others.

**C Code:**

```
#include <stdio.h> // Include standard input/output library
#include <stdlib.h> // Include standard library for additional functions
// Function declaration for 'test' with three integer parameters 'x', 'y', and 'z'
int test(int x, int y, int z);
int main(void){
// Print the result of calling 'test' with different integer values and format the output
printf("%d",test(11, 21, 31));
printf("\n%d",test(11, 22, 31));
printf("\n%d",test(10, 20, 15));
}
// Function definition for 'test'
int test(int x, int y, int z)
{
// Check if the absolute difference between 'x' and 'y' is greater than or equal to 20
// or the absolute difference between 'x' and 'z' is greater than or equal to 20
// or the absolute difference between 'y' and 'z' is greater than or equal to 20
if (abs(x - y) >= 20 || abs(x - z) >= 20 || abs(y - z) >= 20) {
return 1; // If any of these conditions is true, return 1
} else {
return 0; // If none of the conditions is true, return 0
}
}
```

Sample Output:

1 1 0

**Explanation:**

int test(int x, int y, int z) { return abs(x - y) >= 20 || abs(x - z) >= 20 || abs(y - z) >= 20; }

The function ‘test’ takes in three integers x, y, and z. First, the function checks if the absolute difference between x and y is greater than or equal to 20, and if so, returns 1. Then, it checks if the absolute difference between x and z is greater than or equal to 20, and if so, returns 1. Finally, it checks if the absolute difference between y and z is greater than or equal to 20, and if so, returns 1. If none of these conditions are met, it returns 0.

**Time complexity and space complexity:**

The time complexity of the function is O(1), as it only performs a fixed number of operations, regardless of the input size.

The space complexity of the function is O(1), as it only uses a fixed amount of memory to store the input variables and any local variables.

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**Next:** Write a C program to find the larger from two given integers. However if the two integers have the same remainder when divided by 5, then the return the smaller integer. If the two integers are the same, return 0.

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