bai 5
int main() {
    int n, s = 0;
    printf("nhap vao 1 so nguyen: ");
    scanf_s("%d", &n);
    for (int i = 100; i <= n; i += 2)
    if (n % i == 0)
    s++;
    printf("tong cac so chan la : %d", s);
    return 0;

}
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bai 6
int main() {
	printf("nhap bai toan co: ");
	for (int A = 0; A <= 20; A++) {
		for (int B = 0; B <= 33; B++) {
			for (int C = 0; C <= 100; C+=3){
				if ((A + B + C == 100) && (A * 5 + B * 3 + C / 3 == 100)) {
					printf("trau dung: %d, trau nam: %d, trau gia: %d\n", A, B, C);
				}
			}
		}
	}
	return 0;
}
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