题目：

题解：

int candy(int* ratings, int ratingsSize) {
    int ret = 1;
    int inc = 1, dec = 0, pre = 1;
    for (int i = 1; i < ratingsSize; i++) {
        if (ratings[i] >= ratings[i - 1]) {
            dec = 0;
            pre = ratings[i] == ratings[i - 1] ? 1 : pre + 1;
            ret += pre;
            inc = pre;
        } else {
            dec++;
            if (dec == inc) {
                dec++;
            }
            ret += dec;
            pre = 1;
        }
    }
    return ret;
}