Question

How to find all 5-digit numbers that the last digit of the number power the total digits equal to the number itself in C

Answer 1

#include <stdio.h>
#include <math.h>
 
int last_digit_power_total_digits_equal_to(int num) {
    int last_digit = num % 10;
    int total_digits = (int)log10(num) + 1; 
     
    return pow(last_digit, total_digits) == num;
}
 
int main() {
    for (int i = 10000; i < 100000; i++) {
        if (last_digit_power_total_digits_equal_to(i)) {
            printf("%d\n", i);
        }
    }

    return 0;
}
 
 
 
 
/*
run:
 
16807
32768
59049
 
*/

 

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