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

C++Server Side ProgrammingProgramming

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


 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);


Minimum number X: 6
Published on 21-Oct-2019 10:39:28