#include <stdio.h>
#include <string.h>
 
int main() {
	char binario[16][5] = {"0000","0001","0010","0011","0100","0101","0110","0111","1000","1001","1010","1011","1100","1101","1110","1111"};
	char nome[10];
	printf("Insira um valor\n");
	scanf("%s", nome);
	int contador = 0;
	for (; contador < 16; contador++) {
		if (strcmp(nome, binario[contador]) == 0) {
			break;
		}
	} 
	if (contador == 16) {
		printf("Base inicial invalida"); //essa mensagem não faz sentido com o enunciado
	}
}

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

MDAxMQoK

0011