poj3602

简单题

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
using namespace std;

string st;
string g[100] =
{ "ffi", "ffl", "ff", "fl", "fi", "''", "``", "'", "`", ":", ";", ",", ".",
        "?", "!" };
bool vis[300];

int main()
{
    //freopen("t.txt", "r", stdin);
    string a;
    st = "a";
    for (int i = 15; i < 41; i++)
    {
        g[i] = st;
        st[0]++;
    }
    st = "A";
    for (int i = 41; i < 67; i++)
    {
        g[i] = st;
        st[0]++;
    }
    st = "";
    while (getline(cin, a))
        st += a;
    int i = 0;
    int len = st.length();
    memset(vis, 0, sizeof(vis));
    int ans = 0;
    while (i < len)
    {
        bool found = false;
        for (int j = 0; j < 67; j++)
        {
            int l = g[j].length();
            if (l + i <= len && st.substr(i, l) == g[j])
            {
                i += l;
                found = true;
                if (!vis[j])
                {
                    vis[j] = true;
                    ans++;
                }
                break;
            }
        }
        if (!found)
            i++;
    }
    printf("%d\n", ans);
    return 0;
}