1130: find the first character that appears only once

#include<string.h>
#include<iostream>
using namespace std;
int main()
{
	char a[100000];
	char b[100000];
	int count;
	cin.getline(a,100000);
	strcpy(b,a);
	int i=0,j;
	for(i=0;i<strlen(a);i++)
	{
		for(j=0;j<strlen(b);j++)
		{
			if(a[i]==b[j]&&i!=j)
			{
			  count=0;
			  break;
			}
		}
        if(count==1)
        {
        	cout<<a[i];
        	return 0;
		}
		else
		count=1;	
	}
	cout<<"no";
	return 0;
}