1 #include<stdio.h> 2 #include<string.h> 3 #define N 10000 4 void inv(char str[],int n) 5 { 6 int i,j; 7 char temp; 8 for(i=0,j=n-i-1; i<j; i++,j--) 9 temp=str[i],str[i]=str[j],str[j]=temp; 10 } 11 char* bigX(char *str,char *ttr,int num) 12 { 13 int a,s...