#include <stdio.h>

int main(){
  char st1[80], aux;
  int i, j, tam;

  printf("Digite um texto (max. 80):");
  scanf("%s",st1);

  tam=0;
  while(st1[tam] != '\0' && tam < 80){
    tam++;
  }
  
  i = 0;
  j = tam -1;
  while(i < j){
    aux = st1[i];
    st1[i] = st1[j];
    st1[j] = aux;
    i++; j--;
  }
  
  printf("A inversa:%s\n",st1);
}