# Minimum positive integer divisible by C and is not in range [A, B] in C++

Suppose we have three integers A, B, and C. We have to find one minimum integer X, such that X mod C = 0, and X is not in the range [A, B]. If the values of A, B and C are 5, 10 and 4 respectively, then the value of X will be 4. Let us see the steps to get the solution −

Steps

• If C is not in the range [A, B], then return C as a result
• Otherwise get the first multiple of C, which is greater than B, then return that value

## Example

Live Demo

#include <iostream>
using namespace std;
int findMinMumber(int a, int b, int c) {
if (c < a || c > b)
return c;
int res = ((b / c) * c) + c;
return res;
}
int main() {
int a = 2, b = 4, c = 2;
cout << "Minimum number X: " << findMinMumber(a, b, c);
}

## Output

Minimum number X: 6