/** * @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 << idx < 0; i--){ if(0 == flag) idx -= i; else idx += i; cout << idx << ; flag ^= 1; } for(idx = k + 2; idx <= n; idx++) cout << idx << ; cout << \n; return 0;}