#include
     
      #include
      
       #define maxSize 50 typedef struct Node{    int data[maxSize];    int n;}Sqbtree;void createSqbtree(Sqbtree &L,char pre[],int n, int &S){    char ch =pre[S++];    if(ch == ';') return ;    if(ch != '#'){        L.data[n] = ch;        createSqbtree(L,pre,2*n+1,S);        createSqbtree(L,pre,2*n+2,S);    }}void printSqbtree(Sqbtree L,int n){    if(L.data[n] != '#'){        printf("%c",L.data[n]);        if(L.data[2*n+1] != '#' && L.data[2*n+2] != '#')            printf("(");        printSqbtree(L,2*n+1);        if(L.data[n*2+2] != '#')            printf(",");        printSqbtree(L,2*n+2);        if(L.data[2*n+1] != '#' && L.data[2*n+2] != '#')            printf(")");    }}int main(){    Sqbtree L;    int s=0,k=0;    char ch[maxSize] = {
   'a','b','c','#','#','e','#','#','f','g','#','#','h','#','#',';'};    for(int i = 0;i < maxSize;i++){        L.data[i] = '#';    }    createSqbtree(L,ch,k,s);    printSqbtree(L,k);}