uva : 417 - Word Index

#include<cstdio>
#include<cstring>
#include<string>
#include<iostream>
#include<map>
#include<algorithm>
using namespace std;
int main()
{
    //freopen("output.txt","w",stdout);
    int i,j,k,l=1,m=26,n=0,find=83681;
    string s,t;
    map<string, int>cha;
    string ch[84000]={"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
    string c[26]={"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
    for(i=0;i<26;i++)
    {
        cha[ch[i]]=i+1;
    }
    l=0;
    for(l=0;m!=83681;l++)
    {
        s=ch[l];
        for(i=0;i<26;i++)
        {
            t=s;
            t=t+c[i];
            int f=0;
            for(k=0;k<t.length()-1;k++)
            {
                if(t[k]>=t[k+1])f=1;
            }
            if(f==0){
            cha[t]=m;
            ch[m++]=t;
            }
            if(m==83681)break;
        }
    }
    while(cin >> s)
    {
        if(s=="a")cout << "1\n";
        else if(s.length()==1)cout << cha[s]<<endl;
        else if(cha[s]==0)cout << "0\n";
        else cout << cha[s]+1<<endl;
    }
    return 0;
}