TVal FastPower(TVal val, int p) {
if (p == 0) return 1;
if (p == 1) return val;
if (p % 2 == 1)
return val * FastPower(val * val, p / 2);
return FastPower(val * val, p / 2);
}
int main() {
int numSon, exponent;
scanf("%d %d", &numSon, &exponent);
int sum = 0;
for (int i = 0; i < numSon; ++i) {
int mental;
scanf("%d", &mental);
int chance = FastPower(mental, exponent);
if (chance > 0) {
sum += chance;
}
}
printf("%d\n", sum);
return 0;
}
