这么简单的题目还需要解释那么多么？
直接上代码。
/****
*@PoloShen
*Title:A
*/
#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
#include <cmath>
using namespace std;
int n, p, k;
void solve(){
bool first = 1;
if (p - k > 1) { printf("<<"); first = 0;}
for (int i = 1; i <= n; i++){
if (i == p)
{
if (first){ first = 0; printf("(%d)", p); }
else printf(" (%d)", p);
}
else if (p - k <= i && i <= p + k){
if (first){ first = 0; printf("%d", i); }
else printf(" %d", i);
}
else continue;
}
if (p + k < n) printf(" >>\n");
else printf("\n");
}
int main(){
while (cin >> n >> p >> k) solve();
return 0;
}