【例题 7-6 UVA - 140】Bandwidth

在这里输入题意
【题解】
暴力做就好。
O(8!*26^2)
【代码】
/*

  	1.Shoud it use long long ?

  	2.Have you ever test several sample(at least therr) yourself?

  	3.Can you promise that the solution is right? At least,the main ideal

  	4.use the puts("") or putchar() or printf and such things?

  	5.init the used array or any value?

  	6.use error MAX_VALUE?

  	7.use scanf instead of cin/cout?

  	8.whatch out the detail input require

*/

#include <bits/stdc++.h>

using namespace std;

const int N = 300;

string s;

bool bo[N][N],ex[N];

int A[N],pos[N];

vector <int> v;

int n;

int main(){

	#ifdef LOCAL_DEFINE

	    freopen("F:\\c++source\\rush_in.txt", "r", stdin);

	#endif

	ios::sync_with_stdio(0),cin.tie(0);

	while (getline(cin,s)){

	 	if (s[0]=='#') break;

	 	memset(bo,0,sizeof bo);

	 	memset(ex,0,sizeof ex);

	 	int len = s.size();

	 	for (int i = 0;i < len;i++)

	 		if (s[i]==';')

	 			s[i] = ' ';

		stringstream ss(s);

		while (ss>>s){

			int len = s.size();

			ex[s[0]] = true;

			for (int i = 2;i < len;i++){

				bo[s[0]][s[i]] = true;

				bo[s[i]][s[0]] = true;

				ex[s[i]] = true;

			}

		}

		n = 0;

		for (int i = 'A';i <='Z';i++)

			if (ex[i]){

				A[++n] = i;

			}

		v.resize(n+1);

		int ans = 1000;

	  	do{

			for (int i = 1;i <= n;i++) pos[A[i]] = i;

			int temp = 0;

			for (int x = 'A';x<='Z';x++)

				for (int y = 'A';y <= 'Z';y++)

					if (bo[x][y]==true){

					 	temp = max(temp,abs(pos[x]-pos[y]));

				 	}

			if (temp < ans ){

				for (int i = 1;i <= n;i++) v[i] = A[i];

				ans = temp;

			}

	  	}while (next_permutation(A+1,A+1+n));

	  	for (int i = 1;i <= n;i++){

	  		cout << (char)v[i]<<' ';

	  	}

	  	cout <<"-> "<< ans << endl;

	}

	return 0;

}
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【例题 7-6 UVA - 140】Bandwidth

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