求助！样例过了但是全WA

#include <stdio.h>

int main() {
    int n, k;
    int q, p = 0;
    scanf("%d %d", &n, &k);
    int b, c = 0;
    for (int i = 1; i <= n; i++) {
        if (i % k == 0) {
            b = i + b;
            q++;
        } else {
            c = i + c;
            p++;
        }
    }
    double x = b / (q * 1.0);
    double y = c / (p * 1.0);
    printf("%.1f %.1f", x, y);
    return 0;
}