Codeforces Round #275 (Div. 2) c_html/css_WEB-ITnose

/** * @brief Codeforces Round #275 (Div. 2) c * @file c.cpp * @author 面码 * @created 2014/12/10 16:54 * @edited  2014/12/10 16:54 * @type  math * */#include #include #include #include #include #include #include #include #include using namespace std;#define max(a, b)  ((a) > (b) ? (a) : (b))#define min(a, b)  ((a) > (b) ? (b) : (a)) #define abs(a)     ((a) >  0  ? (a) : (0 - (a)))#define CLR(vec)   memset(vec, 0, sizeof(vec))#ifdef DEBUGifstream in;ofstream out;#define CIN in#define COUT out#else#define CIN cin#define COUT cout#endif#define MAXN 100010int n, k;int main(void){    ios_base::sync_with_stdio(0);#ifdef DEBUG    CIN.open("./in",  ios::in);    COUT.open("./out",  ios::out);#endif    CIN >> n >> k;    int idx = 1;    int flag = 1;    COUT  0; i--){        if(0 == flag)            idx -= i;        else            idx += i;        COUT