【題目連結】
http://poj.org/problem?id=2182
【算法】
樹狀數組 + 二分
#include <algorithm>
#include <bitset>
#include <cctype>
#include <cerrno>
#include <clocale>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <limits>
#include <list>
#include <map>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <utility>
#include <vector>
#include <cwchar>
#include <cwctype>
#include <stack>
#include <limits.h>
using namespace std;
#define MAXN 8010
int i,n;
int a[MAXN],ans[MAXN],c[MAXN];
inline int lowbit(int x)
{
return x & (-x);
}
inline void modify(int pos,int val)
{
int i;
for (i = pos; i <= n; i += lowbit(i)) c[i] += val;
}
inline int query(int pos)
{
int i;
int ret = 0;
for (i = pos; i; i -= lowbit(i)) ret += c[i];
return ret;
}
inline int get(int k)
{
int l = 1,r = n,mid;
int ret;
while (l <= r)
{
mid = (l + r) >> 1;
if (query(mid) >= k)
{
ret = mid;
r = mid - 1;
} else l = mid + 1;
}
return ret;
}
int main()
{
scanf("%d",&n);
for (i = 2; i <= n; i++) scanf("%d",&a[i]);
for (i = 1; i <= n; i++) c[i] = lowbit(i);
for (i = n; i >= 1; i--)
{
ans[i] = get(a[i]+1);
modify(ans[i],-1);
}
for (i = 1; i <= n; i++) printf("%d\n",ans[i]);
return 0;
}