> #include <stdio.h>
> #include <string.h>
> 
> int buf[128];
> 
> typedef unsigned char byte;
> 
> struct pfloat {
> 	byte digit[128];
> 	int len;
> 	int dot;
> };
> 
> typedef struct pfloat pfloat;
> 
> void pfloat_parse(char *input_str, pfloat *num) {
> 	char *p = input_str+strlen(input_str)-1;
> 	int post_zero = 0;
> 	for (; p-input_str>=0 && *p == '0'; -- p) {
> 		++ post_zero;
> 	}
> 	
> 	if (p-input_str>=0) {
> 		int dot = 0;
> 		for (; p-input_str>=0 && *p != '.'; -- p, ++ dot) {
> 			num->digit[dot] = *p-'0';
> 		}
> 		-- p;
> 		if (p-input_str>=0) { // has dot
> 			int i, j;
> 			for (i = dot; p-input_str>=0; -- p, ++ i) {
> 				num->digit[i] = *p-'0';
> 			}
> 			for (j = i-1; j > -1 && num->digit[j] == 0; -- j);
> 			num->len = j+1;
> 			num->dot = dot;
> 		}
> 		else {
> 			int j;
> 			for (j = dot-1; j > -1 && num->digit[j] == 0; -- j);
> 			num->len = j+1;
> 			num->dot = -post_zero;
> 		}
> 	}
> 	else {
> 		num->len = 0;
> 		num->dot = 0;
> 	}
> }
> 
> void pfloat_multi(pfloat *a, pfloat *b, pfloat *r) {
> 	memset(buf, 0, sizeof(int)*128);
> 	
> 	for (int i = 0; i < a->len; ++ i) {
> 		for (int j = 0; j < b->len; ++ j) {
> 			buf[i+j] += a->digit[i] * b->digit[j];
> 		}
> 	}
> 	
> 	int c = 0; int len;
> 	for (len = 0; len < a->len+b->len-1; ++ len) {
> 		int k = buf[len]+c;
> 		buf[len] = k%10;
> 		c = k/10;
> 	}
> 	if (c || buf[len]) {
> 		buf[len] = buf[len]+c;
> 		++ len;
> 	}
> 	
> 	for (int i = 0; i < len; ++ i) {
> 		r->digit[i] = buf[i];
> 	}
> 	r->len = len;
> 	r->dot = a->dot + b->dot;
> }
> 
> void pfloat_print(pfloat *p) {
> 	if (p->len == 0) {
> 		printf("0\n");
> 		return;
> 	}
> 	
> 	if (p->dot <= 0) {
> 		for (int i = 0; i < p->len; ++ i) {
> 			printf("%d", p->digit[p->len-1-i]);
> 		}
> 		for (int i = p->dot; i < 0; ++ i) {
> 			printf("0");
> 		}
> 	}
> 	
> 	else if (p->dot < p->len) {
> 		int i;
> 		for (i = 0; i < p->len-p->dot; ++ i) {
> 			printf("%d", p->digit[p->len-1-i]);
> 		}
> 		printf(".");
> 		for (; i < p->len; ++ i) {
> 			printf("%d", p->digit[p->len-1-i]);
> 		}
> 	}
> 	
> 	else {
> 		printf(".");
> 		for (int i = 0; i < p->dot-p->len; ++ i) {
> 			printf("0");
> 		}
> 		for (int i = 0; i < p->len; ++ i) {
> 			printf("%d", p->digit[p->len-1-i]);
> 		}
> 	}
> 	printf("\n");
> }
> 
> int main(int argc, char **argv)
> {
> 	char input[32];
> 	int exp;
> 	
> 	pfloat *a = new pfloat, *b = new pfloat;
> 	while (scanf("%s%d", input, &exp) != EOF) {
> 		pfloat_parse(input, a);
> 		b->len = 1, b->digit[0] = 1, b->dot = 0;
> 		for (int i = 0; i < exp; ++ i) {
> 			pfloat_multi(a, b, b);
> 		}
> 		pfloat_print(b);
> 	}
> 	delete a, delete b;
> 	return 0;
> }