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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int topi=-1;
  4. char  ch2[100001];
  5. char top()
  6. {
  7.     return ch2[topi];
  8. }
  9.  
  10. char* push(char a)
  11. {
  12.     ch2[++topi] = a;
  13. }
  14.  
  15. void pop()
  16. {
  17.     topi--;
  18. }
  19.  
  20.  
  21. int main()
  22. {
  23.     int a,b,c,d,e,f,g,h,i,j;
  24.     cin>>a;g=0;char z;char ch[100001];
  25.     for(b=0;b<a;b++)
  26.     {
  27.         fflush(stdin);
  28.         gets(ch);
  29.      c = strlen(ch);
  30.      ch[c] = '\0';topi=-1;
  31.      for(d=0;d<c;d++)
  32.      {
  33.      if(d==0)
  34.         {
  35.             push(ch[d]);
  36.         }
  37.         else{
  38.             if(topi!=-1 && top()==ch[d])
  39.             {
  40.                 e++;
  41.                 pop();
  42.             }
  43.             else{
  44.                 push(ch[d]);
  45.             }
  46.         }}
  47.  
  48.         if(topi==-1)
  49.             g++;
  50.             else{}
  51.             }
  52.     cout<<g<<"\n";
  53.     }
  54.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:28:16: error: ‘gets’ was not declared in this scope
         gets(ch);
                ^
stdout
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Standard output is empty
https://ideone.com/EIXHIv
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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