end

#include <stdio.h>
#include<math.h>

enum Type{INT,CHAR};
int isDigit(char c){return '0'<=c && c<='9';}
int isAlpha(char c){return ('a'<=c && c<='z')||('A'<=c && c<= 'Z');}

void ignoreTillNewline(File*in){while getc(in)!='\n' && ! feof(in));
}
int readArray(FILE *in,char *nums,int*nums_size,enumType*arr_type)
{char c;
int i=0;

if((c=getc(in)=='[')
c=getc(in);
while(c!=']' && c!='\n' && ! feof(in))
{
if(c=='\")
*arr_type=CHAR;
else if (isDigit(c) || c=='-')
*arr_type=INT;
else
{
if(c !='\n')
ignoreTillNewLine(in);
return 0;
}
}
if(*arr_type==CHAR)
c=gets(in);
if(isAlpha(c))
{
nums[i++] =c;
c=gets(in);
if(c!='\")
{
if(c !='\n')
ignoreTillNewLine(in);
}
}
else
{
if (c!='\n')
ignoreTillNewLine(in);
return 0;
}
}
if (*arr_type==CHAR)
c=getc(in)
if(isAlpha(c)=
{
nums[i++] = c;
c = getc(in);
if (c !='\")
{
if(c !='\n')
ignoreTillNewLine(in);
}
}
else
{
if (c!='\n')
ignoreTillNewLine(in);
return 0;
}
}
else
{
if (c == '-')
{
nums[i++] = -(getc(in-'0');
}
else if(isDigit(c))
{
nums[i++] = c-'0';
}
else
{
if (c!='\n')
ignoreTillNewLine(in);
return 0;
}
}
c=getc(in);
if (c==',') c=getc(in);
if (c=='') c=getc(in);
}
*num_size = i;
ignoreTillNewLine(in);
return 1;
}
if (c !='\n')
ignoreTillNewLine(in);
return 0;
}
void printPiwerSet(FILE *out,char*nums,int nums_size,enum Type type)
{
fprint(out,"[[]");
for (size_t i=1;i<pow(2,nums_size);i++)
{
fprint(out,",[");
for(int j=0; j<nums_size;j++)
{
if(i & (1<<j))
{
fprintf(out,(type == INT)?"%d",:"%c",nums[i]);
}
}
fseek(out,-2,SEEK_CUR);
fprintf(out,"]");
}
fprintf(out,"]\n);
}
int main()
{
FILE *in = fopen("input.txt","r");
FILE *out = fopen("output.txt","w");
char nums[7];
int nums_size = 0;
enum Type arr_type;
while(!fof(in))
{
if  (readArray(in,nums,&nums_size,&arr_type))
{
printPowerSet(std out,nums_size,arr_type);
printPowerSet(out,nums,nums_size,arr_type);
}
else
{
printf("Error,input is not in correct firmat.Use [] with elements " "seprated by,E.g.,[1,2,3]\n");
fprint(out,"Error,input is not in correct firmat.Use [] with elements " "seprated by,E.g.,[1,2,3\n");
}
}
return 0;
}