Codeforces Round #146 (Div. 2), problem: (A) Boy or Girl solution

Codeforces Round #146 (Div. 2), problem: (A) Boy or Girl: http://codeforces.com/problemset/problem/236/A

Codeforces Round #146 (Div. 2), problem: (A) Boy or Girl editorial: http://codeforces.com/blog/entry/5592

Codeforces Round #146 (Div. 2), problem: (A) Boy or Girl solution: http://ideone.com/SdHXlb

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

int main() {
    int a[30]={0}, cnt=0;
    char s[105];
    scanf("%s", s);
    for(int i=0; i<strlen(s); i++) {
        if(a[s[i]-97]==0) cnt++;
        a[s[i]-97]++;
    }
    if(cnt%2==0) printf("CHAT WITH HER!");
    else printf("IGNORE HIM!");
    return 0;
}