Little Elephant and Bits

#include<stdio.h>
#include<string.h>
int main ()
{
    int i=0,flag=0,n;
    char a[100001];
    scanf("%s",a);
    n=strlen(a);
    while(a[i]>=a[i+1]&&i<n-1)
    {
        i++;
    }
    a[i]=1;
    for(i=0;i<=n-1;i++)
    {
        if(a[i]!=1)
            printf("%c",a[i]);
    }
    return 0;
}

http://codeforces.com/contest/258/problem/A