Maximum positive integer divisible by C and is in the range [A, B] in C++

Here we will see one interesting problem. let us consider 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. We have to follow these 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

Arnab Chakraborty

Updated on 21-Oct-2019 07:10:26

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