text: #include <string.h>
  #include <stdio.h>
  
  int isSubsequence(char * s, char * t){
  	int slen = strlen(s);
  	int tlen = strlen(t);
  	int i = 0, j = 0;
  	while(i < slen && j < tlen){
  		if(s[i] == t[j++])
  			++i;
  	}
  	if(i == slen)
  		return 1;
  	else
  		return 0;
  }