POJ3270置换群

#include<iostream>
#include<cstdlib>
#include<stdio.h>
#include<algorithm>
using namespace std;
int a[10010];
int c[10010];
struct Node
{
	int id;
	int num;
} node[10010];
int cmp(Node a, Node b)
{
	return a.num < b.num;
}
int main()
{
	int n;

	while (scanf("%d", &n) != EOF)
	{
		int minn = 100000;
		int sum1 = 0;

		for (int i = 1; i <= n; i++)
		{
			scanf("%d", &a[i]);
			sum1 += a[i];
			node[i].num = a[i];
			node[i].id = i;

			if (a[i] < minn)
			{
				minn = a[i];
			}

			c[i] = i;
		}

		sort(node + 1, node + n + 1, cmp);

		for (int i = 1; i <= n; i++)
		{   //printf("%d ", i);
			int t;

			if (a[i] != 0)
			{
				int count = 1;
				t = node[i].num;
				int d = node[i].id;

				if (a[d] < t)
				{
					t = a[d];
				}

				while (d != i)
				{
					count++;
					d = node[d].id;
					//printf("%d#", a[d]);
					if (a[d] < t)
					{
						t = a[d];
					}
				}
				puts("\n");
				int v = (count - 2) * t;
				int w = (count + 1) * minn + t;
				sum1 += v < w ? v : w;
				a[i] = 0;
			}
		}
		cout << sum1 << endl;
	}
}