#include <stdio.h>

int main(void){

  int k, m, n, i, sum = 0;

  printf("Enter two integers m an n.\n");
  scanf("%d %d", &m, &n);

  printf("Enter an integer k greater than 1.\n");
  scanf("%d", &k);

  for(i=m; i<=n; i++){
    if (i % k == 0){
      sum += i;
    }
  }

  printf("Sum of numbers between %d and %d that are divisible by %d: %d \n", m, n, k, sum);
 
  return 0;
}