#include<stdio.h>
#include<math.h>
long long calculateSpellPower(int base, int exponent){
    if(base < 0){
        return -1;
    }
    return (long long)pow(base, exponent);
}
int main(){
    int base, exponent;
    scanf("%d", &base);
    scanf("%d", &exponent);
    long long result = calculateSpellPower(base, exponent);
    if (result == -1){
        printf("Invalid input\n");
    }else{
        printf("%lld\n", result);
    }
    retuen 0;
}