#include <iostream>
#include <string>
using namespace std;

int main()
{
	string s;
	cin >> s;
	bool* match = new bool[s.length()];
	int i, j;

	for(i = 0; i < s.length(); ++i)
		match[i] = false;

	int sleft, sright, bleft, bright;
	sleft = sright = bleft = bright = 0;

	string result;
	for(i = 0; i < s.length(); ++i)
	{
		if(s[i] == '(')
		{
			sleft = 1;
			sright = 0;
			for(j = i+1; j < s.length(); ++j)
			{
				if(s[j] == '(')
					++sleft;
				else if(s[j] == ')')
					++sright;
				if(sleft == sright)
					break;
			}
			if(sleft == sright)
			{
				result += '(';
				match[j] = true;
			}
			else
				result += "()";
		}
		else if(s[i] == ')')
		{
			if(match[i])
				result += ')';
			else
				result += "()";
		}
		else
		{
			result += s[i];
		}
	}

	s = result;
	result = "";

	delete[] match;

	match = new bool[s.length()];

	for(i = 0; i < s.length(); ++i)
		match[i] = false;

	for(i = 0; i < s.length(); ++i)
	{
		if(s[i] == '[')
		{
			sleft = 0;
			sright = 0;
			bleft = 1;
			bright = 0;
			for(j = i+1; j < s.length(); ++j)
			{
				if(s[j] == '[')
				{
					if(sleft != sright)
						break;
					++bleft;
				}
				else if(s[j] == ']')
				{
					if(sleft != sright)
						break;
					++bright;
				}
				else if(s[j] == '(')
					++sleft;
				else if(s[j] == ')')
					++sright;
				if(bleft == bright)
					break;
			}
			if(bleft == bright)
			{
				result += '[';
				match[j] = true;
			}
			else
				result += "[]";
		}
		else if(s[i] == ']')
		{
			if(match[i])
				result += ']';
			else
				result += "[]";
		}
		else
		{
			result += s[i];
		}
	}

	delete[] match;

	cout << result << endl;


	return 0;
}

• 代码帖错了，是这个！ (1706) sky_handsome 2007-05-10 23:30:40
  • DP (4) Leimiaos 2007-08-05 19:10:17