hdu 1544 水题

　　水题

/*
 * Author    : ben
 */
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <ctime>
#include <iostream>
#include <algorithm>
#include <queue>
#include <set>
#include <map>
#include <stack>
#include <string>
#include <vector>
#include <deque>
#include <list>
#include <functional>
#include <numeric>
#include <cctype>
using namespace std;
const int MAX_LEN = 5009;
char str[MAX_LEN];
int work() {
    int len = strlen(str);
    int ret = 0, j, k;
    for(int i = 0; i < len; i++) {
        j = i;
        while(j >= 0) {
            k = 2 * i - j;    
            if(k >= len || str[j] != str[k]) {
                break;
            }
            ret++;
            j--;
        }
    }
    for(int i = 1; i < len; i++) {
        j = i - 1;
        if(str[j] != str[i]) {
            continue;
        }
        while(j >= 0) {
            k = 2 * i - 1 - j;    
            if(k >= len || str[j] != str[k]) {
                break;
            }
            ret++;
            j--;
        }
    }
    return ret;
}

int main() {
    while(scanf("%s", str) == 1) {
        printf("%d\n", work());
    }
    return 0;
}