q16.c

#include <stdio.h>

int count(int l, int r, int n, int m) 
{ 
    int count = 0;
    for (int i = l; i <= r; i++) {
        int sum = 0, x = i, t;
        t = (i % m); 
        while (x != 0) { 
            sum += x % 10; 
            x /= 10; 
        }
        if (!(t) && sum == n) 
            count++; 
    } 
    return count; 
} 

int main() 
{ 
    int l, r, n, m;
    scanf("%d\n%d\n%d\n%d", &l, &r, &n, &m);
    printf("%d\n", count(l, r, n, m));
    return 0; 
}